Resolved 2013 A3 TDi DPF icon on dash, NOx/P1A58, even with readiness bits zeroed

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Frau_Blau

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VCDS Serial number
C?ID=535647
FYI since this is my first post here I'll say that I am not an auto tech but a longtime gearhead with most of my history involving carburetors, mechanical timing and injection. I have a very good understanding of closed-loop control systems and quite a bit of experience on the industrial side but less with OBD2 even less with VCDS. Learning... FWIW I have worked with Bosch CIS, L-Jet, K-Lambda, and a few more modern systems like MAP/MAF systems. Since my wife bought this A3(and named it Frau Blau) it is now incumbent upon me to learn the system so here I am.

I have been working this problem on and off since mid-November '24 due to various other priorities. It was around that time that the DPF icon appeared on the dash. We tried a couple of things, like running at high RPM for a half-hour freeway drive first without then with a DPF cleaning additive, to no apparent effect. As of right now all readiness bits are zeroed, so I believe the conditions for NOx regen have been achieved but I still have the icon and the DTC. More details follow, after I get to the JPPSG stuff:

1)
BuildSticker.jpg


2) Car is stock AFAIK, I did pick around trying to enable all windows up/down via remote over a year ago but do not recall the specifics. Hope to circle back on that after the matter at hand.

3) Auto-Scan -- The last of a few scans I performed around the same time, performed one after the other with the car hot and idling. This is my most recent of all auto-scans. Two of these most recent scans I did following the instructions in this video to capture measuring values and adaptations in both pre-label file and hex mode so I can post any of that upon request.

Code:
Sunday,19,January,2025,16:08:37:29292
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 24.7.1.0 (x64)  HEX-V2 CB: 0.4643.4
Data version: 20240919 DS356.3
www.Ross-Tech.com


VIN: WAUKJAFM2DA032998   License Plate: 


Chassis Type: FM-AU35 (7N0)
Scan: 01 02 03 08 09 0F 15 16 17 19 25 42 44 46 47 4C 52 55 56 62
          72 77

VIN: WAUKJAFM2DA032998   Mileage: 160170km-99525miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
0F-Digital Radio -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: Malfunction 0010
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
4C-Tire Pressure II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: Cannot be reached 1100
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: Malfunction 0010
-------------------------------------------------------------------------------
Address 01: Engine (CBE)       Labels: 03L-906-022-CBE.CLB
   Part No SW: 03L 997 030 A    HW: 03L 906 019 EJ
   Component: R4 2.0l TDI G000AG  9983  
   Revision: 12H15---    Serial number: AUX7Z0L7FN601G
   Coding: 0050078
   Shop #: WSC 42395 001 1048576
   VCID: 2C01086DBA0C11AAD33-8078
   VINID: 9D195B69159D0944400C224920A5628933

1 Fault Found:
006744 - NOx Catalyst 
               P1A58 - 000 - Regeneration Required
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 6
                    Fault Frequency: 43
                    Reset counter: 255
                    Mileage: 159595 km
                    Time Indication: 0
                    Date: 2024.02.20
                    Time: 15:11:02

             Freeze Frame:
                    RPM: 828 /min
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Pressure: 943.8 mbar
                    Temperature: 9.0░C
                    Mass Air / Rev.: 285.0 mg/str
                    Temperature: 14.4░C

Readiness: 0 0 0 0 0 

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 02E-927-770.CLB
   Part No SW: 02E 300 062 B    HW: 02E 927 770 AL
   Component: GSG DSG AG6     512 9430  
   Revision: 05551213    Serial number: 00001207020171
   Coding: 0000020
   Shop #: WSC 06314 000 00000
   VCID: 1471B08D027CA96AEB3-8040

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 1K0-907-379-60EC1F.CLB
   Part No SW: 1K0 907 379 BL    HW: 1K0 907 379 BL
   Component: ESP MK60EC1   H31 0152  
   Revision: 00H31001    
   Coding: 1150400F492500FC881402ED92210042BF0C00
   Shop #: WSC 06314 000 00000
   VCID: 7DA7F5291DF6482234D-8028

1 Fault Found:
01325 - Control Module for Tire Pressure Monitoring (J502) 
            004 - No Signal/Communication - Intermittent
             Freeze Frame:
                    Fault Status: 00100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 75
                    Mileage: 159764 km
                    Time Indication: 0
                    Date: 2024.03.02
                    Time: 17:03:36

             Freeze Frame:
                    Count: 3
                    Count: 15
                    Count: 4096
                    Count: 16390
                    Count: 34816
                    Count: 11008
                    Count: 253
                    Count: 0


-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8P0-820-043.LBL
   Part No SW: 8P0 820 043 BM    HW: 8P0 820 043 BM
   Component: KlimavollautomatH09 0180  
   Revision: 000195      Serial number: 8P0820043BM   
   Shop #: WSC 00000 000 00000
   VCID: 78A9E43D3ED46D0A67B-802C

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 8P0-907-063.CLB
   Part No SW: 8P0 907 063 Q    HW: 8P0 907 063 Q
   Component: BCM PQ35  M   111 0719  
   Revision: AM111715    
   Coding: 6E000A0FA01336E4287241E000100D4D401E62AA104DD128E40008840040
   Shop #: WSC 42395 001 1048576
   VCID: 42DD46D52488F7DA09F-8016

   Subsystem 1 - Part No SW: 8P1 955 119 F    HW: 8P1 955 119 F  Labels: 1KX-955-119.CLB
   Component: Wischer AU350  H11 0050 
   Coding: 00DD13

   Subsystem 2 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H05 1501 

2 Faults Found:
00446 - Function Limitation due to Under-Voltage 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 74
                    Mileage: 159764 km
                    Time Indication: 0
                    Date: 2024.03.02
                    Time: 17:18:00

             Freeze Frame:
                        Term 15 On
                    Voltage: 7.80 V
                        ON
                        ON
                        Term 50 Off
                        OFF
                        OFF

01134 - Alarm Horn (H12) 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 74
                    Mileage: 159764 km
                    Time Indication: 0
                    Date: 2024.03.02
                    Time: 17:18:01

             Freeze Frame:
                        Term 15 On
                    Voltage: 7.80 V
                        ON
                        ON
                        Term 50 Off
                        OFF
                        OFF


-------------------------------------------------------------------------------
Address 0F: Digital Radio        Labels: 8E0-035-593-SIR.LBL
   Part No SW: 8E0 035 593 P    HW: 8E0 035 593 P
   Component: SDAR SIRIUS     H07 0160  
   Revision: 00000000    Serial number: AUZ4Z7M0621430
   Coding: 0000100
   Shop #: WSC 06314 000 00000
   VCID: 36352A0574405B7AB57-8062

2 Faults Found:
02635 - Tuner Not Enabled/Activated 
            000 - -
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 7
                    Fault Frequency: 1
                    Reset counter: 20
                    Mileage: 158837 km
                    Time Indication: 0
                    Date: 2024.01.22
                    Time: 18:02:13

01304 - Radio 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 5
                    Fault Frequency: 23
                    Reset counter: 40
                    Mileage: 160169 km
                    Time Indication: 0
                    Date: 2024.03.19
                    Time: 13:48:24


-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 8P0-959-655-10.clb
   Part No SW: 8P0 959 655 Q    HW: 8P0 959 655 Q
   Component: Airbag AU1042 H10 0250  
   Revision: --------    Serial number: 003FC001VJPK Dataset Number: 8P0909602N  0004
   Coding: 303142393041303030374A55304C38503053
   Shop #: WSC 06314 000 00000
   ASAM Dataset: EV_Airba10AURB4 001001
   ROD: EV_Airba10AURB4_AU35.rod
   VCID: 50F97C9DFA64154A8FB-8004

   Seat occupied recognition: 
   Subsystem 1 - Part No SW: 8P0 959 339 E    HW: 8P0 959 339 E
   Component: BF-Gewichtss.  H04 0040 
   Serial number: 5850000R1271100A4S
   Coding: 000000

   Crash sensor for side airbag: driver side: 
   Serial number: 3572DRB40000EBACB9BL

   Front Passenger's Side Airbag Crash Sensor: 
   Serial number: 3582DRB40000EBD0B889

   Rear Side Airbag Crash Sensor (on driver's side): 
   Serial number: 35128RB400006CA899E0

   Passenger side rear thorax airbag crash sensor: 
   Serial number: 35228RB400006CA59AE%

   Crash sensor for front airbag: driver side: 
   Serial number: 35547RB400006CA22C7V

   Crash sensor for front airbag: front passenger side: 
   Serial number: 35647RB400006CA22C8X

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8P0-953-549.LBL
   Part No SW: 8P0 953 549 K    HW: 8P0 953 549 K
   Component: J0527           H38 0070  
   Coding: 0014142
   Shop #: WSC 06314 000 00000
   VCID: 46D55AC504A0CBFA257-8012

   Subsystem 1 - Part No: XXXXXXXXXXX 
   Component: E0221           H02 0100

1 Fault Found:
01304 - Radio 
            004 - No Signal/Communication

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 8P0-920-XXX-17-MY8.CLB
   Part No SW: 8P0 920 983 L    HW: 8P0 920 983 L
   Component: KOMBIINSTR. VDO H03 0380  
   Revision: D0H03005    Serial number: 2247L005001963
   Coding: 0272288
   Shop #: WSC 12345 123 12345
   VCID: 43D343D13792FED2029-8016

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 7N0-907-530-V2.CLB
   Part No SW: 7N0 907 530 R    HW: 7N0 907 530 H
   Component: J533  Gateway H42 1632  
   Revision:   H42       Serial number: 190712F1001001
   Coding: 352102
   Shop #: WSC 06314 000 00000
   VCID: 3FDB4F21577A9A32661-806A

1 Fault Found:
01304 - Radio 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 20
                    Mileage: 158837 km
                    Time Indication: 0
                    Date: 2024.01.22
                    Time: 18:02:07


-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-XXX-25.CLB
   Part No SW: 8P0 920 983 L    HW: 8P0 920 983 L
   Component: KOMBIINSTR. VDO H03 0380  
   Revision: D0H03005    Serial number: AUX7Z0L7FN601G
   Shop #: WSC 00000 000 00000
   VCID: 43D343D13792FED2029-8016

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 8P0-959-801-MIN3.LBL
   Part No SW: 8P0 959 801 Q    HW: 8P0 959 801 Q
   Component: Tuer-SG         H04 0101  
   Coding: 0001181
   Shop #: WSC 06314 000 00000
   VCID: 49CF51F915BE2482C85-801C

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14X-GEN3.CLB
   Part No: 1K0 909 144 P
   Component: EPS_ZFLS Kl. 232    3305  
   Revision: 00H22000    
   Shop #: WSC 02069 000 90108
   VCID: 372B2701734AA272AE1-8062

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System        Labels: 8PX-035-382.LBL
   Part No SW: 8P4 035 382 E    HW: 8P4 035 382 E
   Component: AB2 SUBWOOFERBOXH07 0180  
   Revision: 00006       Serial number: 92158230628875
   Shop #: WSC 00000 000 00000
   VCID: 36352A0574405B7AB57-8062

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels:. 1K0-959-702-MIN3.CLB
   Part No SW: 8P0 959 802 Q    HW: 8P0 959 802 Q
   Component: Tuer-SG         H04 0101  
   Coding: 0001181
   Shop #: WSC 06314 000 00000
   VCID: 4ACD6EF510B82F9AC1F-801E

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range (J431)       Labels:| 8X0-907-357.clb
   Part No SW: 8X0 907 357 C    HW: 8X0 907 357 B
   Component: ****LWR12**** H02 0020  
   Serial number: 120727-0002-066
   Coding: 1163951010020400
   Shop #: WSC 06314 000 00000
   ASAM Dataset: EV_HeadlRegulBasic 005001
   ROD: EV_HeadlRegulBasic.rod
   VCID: 42DD46D52408F7DA09F-8016

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio
Cannot be reached

-------------------------------------------------------------------------------
Address 62: Door, Rear Left        Labels: 8P4-959-801.LBL
   Part No SW: 8P4 959 801 F    HW: 8P4 959 801 F
   Component: Tuer-SG         H04 0050  
   Coding: 0001176
   Shop #: WSC 06314 000 1012544
   VCID: 42DD46D52888F7DA09F-8016

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right        Labels: 8P4-959-802.LBL
   Part No SW: 8P4 959 802 F    HW: 8P4 959 802 F
   Component: Tuer-SG         H04 0050  
   Coding: 0001176
   Shop #: WSC 06314 000 1012544
   VCID: 43D343D13792FED2029-8016

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 8P0-862-335.LBL
   Part No SW: 8P1 862 336 A    HW: 8P1 862 336 
   Component: FSE_256x BT     H44 0660  
   Revision: 00000000    Serial number: 00000005175360
   Coding: 0001277
   Shop #: WSC 06314 000 00000
   VCID: 36352A0574405B7AB57-8062

2 Faults Found:
02503 - Output Wire to Radio 
            011 - Open Circuit
             Freeze Frame:
                    Fault Status: 01101011
                    Fault Priority: 5
                    Fault Frequency: 1
                    Reset counter: 20
                    Mileage: 158837 km
                    Time Indication: 0
                    Date: 2024.01.22
                    Time: 18:01:04

01304 - Radio 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 6
                    Fault Frequency: 101
                    Reset counter: 41
                    Mileage: 158837 km
                    Time Indication: 0
                    Date: 2024.01.22
                    Time: 18:01:04


End----------(Elapsed Time: 46:12, VBatt start/end: 13.8V/13.8V)-----------


4) No recent repairs, was last in shop for oil change back in April. There is apparently a leaky turbo seal on the inlet that is causing seepage around where the center housing meets the compressor housing, I doubt it is relevant but including in case I'm wrong -- it's the only actual problem I have observed with/around the engine.

5) No parts changes on powertrain since purchased ~26K miles ago

6) Recent low voltage/battery related issues shown in the scan due to my leaving things on while working inside one of the back doors on/around Dec 2. Since then charging system works and battery load tested good. Steering wheel/radio codes due to aftermarket radio install and reassignment of steering wheel controls some years back. These may be ignored AFAIK but as an aside would welcome help clearing the individual codes in a way that won't impact readiness.

Main issue at hand is DPF icon showing on dash, NOx/P1A58 code found in VCDS even after seeing readiness bits all zeroed. Unfortunately I did not capture this readiness state with VCDS first time around but having reset all DTCs and cleared all readiness bits again the DTC persists. On or about Nov. 23 I reset the DTC and it came right back with a new date in the freeze frame, that date being approx. 307 days prior to the current date. It did not register with me right away that it had changed, my mind read it as "a long time ago".

Many experiments later I realized that this was not the case, when the DTC is reset and reappears it shows this date stamp ~307 days in the past. However, I found that the instrument cluster clock was set to about 308 days in the past. So I set out to confirm that this caused the "way in the past" value. I tried running an auto-scan, then resetting the date via the cluster, then shut down the car/VCDS Hex and VCDS software down for 15 minutes, set it all up and ran another scan and the date is unchanged. My guess is it is stored as an absolute date, not a relative-to-today date. I am guessing that if I reset the DTC again with the clock set properly it should give a correct date, but I am reluctant to do so since I do not want to have to go through the long process of clearing readiness bits again. I want to consult with the experts here as to the best way forward from the current state. I suppose it is also possible that the ECU has its own clock that is just way off but it would be an odd coincidence that the cluster would be off by about the same amount.

FWIW, since trying to understand both VCDS and the system drive cycles we have driven and observed regen-like behavior, as in high temps up to ~750° between catalysts at times. All of the exhaust/catalyst temp readings seem sane, heating and cooling with load as expected, some up to ~450° some up to ~750°+ and I think I have seen over 800°. Apologies for the sparse data from early experiments, but IIRC we were getting very low soot readings. We were monitoring G100(Particle Filter Differential) and G108(oil ash volume ml) and we were seeing G100 numbers like 5mg at idle, up to 20mbar at high speed uphill where IIRC ~40 differential is problem territory, G108 is locked at 108. I now believe, after the fact, that the PA0158 is telling me it's NOT the DPF... but I wanted to share this info for whatever value it may have in confirming that.

For me the big question is, given where I am at based on the data given(and any further data which I am happy to provide if able) what line of investigation or what actions should I take to either:
* Perform a proper diagnosis of the DTC and DPF icon on the dash so I can perform a repair, thus clearing the DTC
* Clear the DTC properly in the event it is not an actual malfunction but a series of conditions I have not yet met.

This is the last readiness dump, performed after the last auto-scan that day(above):

Code:
Sunday,19,January,2025,16:18:52:29292
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 24.7.1.0 (x64)  HEX-V2 CB: 0.4643.4
Data version: 20240919 DS356.3
www.Ross-Tech.com


VIN: WAUKJAFM2DA032998   License Plate: 1
Mileage: 160170km-99525mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Readiness Status: 00000000 00001111 11101011 00000000
MIL Status: MIL OFF
Comprehensive Components: Passed
Fuel System: Passed
Exhaust Gas Recirculation: Passed
Number of EOBD-related DTC(s): 0
 
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   #2  

Uwe

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The car is not upset about the DPF. It's upset about the NOx Cat/trap.

Have you tried the NOx Catalyst regeneration process?

[Select]
[01-Engine]
[Adaptation]
- Channel 018.
- Change New Value to 1
[Save] or [Test] -> [Save]
- Drive the car at a steady speed between 80 and 120 km/h while observing MVB 104 for status.
- It may take 45-60 minutes of steady driving for the regen cycle complete.

-Uwe-
 
   #3  

Frau_Blau

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Thanks Uwe, I think I tried something similar but it required a security code. I can go out to the car a bit later and try to retrace my steps to confirm. I recall a requirement to maintain 1900-2400 RPM as well, so maybe not the same adaptation?

To be clear, if I have to leave that speed range(e.g. traffic slowdown) I assume that I have to start over? If so, would I just re-enter the '1' value in channel 018 or do I need to stop, shut down, restart VCDS?
 
   #4  

SaVAGeSoot

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Some of these regens need a proper operating temp.... those engines have a lot of known thermostat failures and such which will keep them from reaching and maintaining full operating temp.... take it for a rip on the freeway and validate that you're able to fully warm up and maintain close to 90ºC water temp.... I can't recall the exact temp requirement now...
 
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Frau_Blau

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I have observed in VCDS that temp runs a stable 90°, it takes me 1/2 hour to get to a freeway so should be fully heat-soaked and stable when I initiate. I will confirm temp shown in VCDS before initiating regen. Probably have to start after dinner tonight, bay area traffic being what it is.

Do I need to be at the specified speed before saving the '1' in Channel 018, or can I do that in a more safe manner at the side of the road then get on the freeway? Kinda hard to operate the laptop while driving, I really shouldn't if it's not a hard requirement.
 
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Bruce

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--------
You wrote:
do that in a more safe manner at the side of the road then get on the freeway? Kinda hard to operate the laptop while driving, I really shouldn't if it's not a hard requirement.
Might there be another solution? A friend with the laptop in the backseat so they do not eat the laptop should an air bag deploy from the dash? For Safety, that is the best means....
 
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Frau_Blau

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You wrote:

Might there be another solution? A friend with the laptop in the backseat so they do not eat the laptop should an air bag deploy from the dash? For Safety, that is the best means....
Thanks for the idea, Bruce. Are you saying I need to be at speed before initiating the adaptation?

There is my wife but she does not have time to go on a 3+ hour drive with me this week. Local friends are similarly busy. That's 30 min to/from freeway, up to an hour to complete adaptations if I don't hit traffic, an hour to return.
 
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Frau_Blau

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The car is not upset about the DPF. It's upset about the NOx Cat/trap.

Have you tried the NOx Catalyst regeneration process?

[Select]
[01-Engine]
[Adaptation]
- Channel 018.
- Change New Value to 1
[Save] or [Test] -> [Save]
- Drive the car at a steady speed between 80 and 120 km/h while observing MVB 104 for status.
- It may take 45-60 minutes of steady driving for the regen cycle complete.

-Uwe-
Confirmed, I did follow this step but there were still readiness bits set to one. Will try again now that they are all zeroed.
 
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Uwe

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I think I tried something similar but it required a security code.
Oops, yes, I forgot about that. Go to Security Access first and wait a moment or two. VCDS should pop up an info balloon with a Security Access code for "Adaptation Enabling".

-Uwe-
 
   #11  

Frau_Blau

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I did the 018 regen and the DTC has changed to intermittent but not gone away, and the icon is gone though I do not feel like I completed the regen cycle.

Initially I drove as described above, worked out to 59MPH in 5th to get 2,200 RPM. After about 25 minutes the icon disappeared from the dash. At this point MBV 104 was 0xFF01 and it stayed that way for a little more than another hour of driving. Basically stuck here:

Code:
Wednesday,22,January,2025,16:14:23:29292
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 24.7.1.0 (x64)  HEX-V2 CB: 0.4643.4
Data version: 20240919 DS356.3
www.Ross-Tech.com


VIN: WAUKJAFM2DA032998   License Plate: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 01: Engine  (03L 997 030 A)

16:14:20 Group 104: Emissions re-treatment
  0xFF01  Emissions re-treatment operation mode
  0xFF21  Emissions re-treatment operation mode lowest stage
  00000000  Bin. Bits 
  00000000  Bin. Bits

I decided to try my luck on the return trip, after cycling the ignition. I barely turned around to get on the freeway and the DPF icon came back on. I performed the same drive cycle again and the DPF icon went out within 15 minutes or so but again MVB 104 never reached 0xFF02. It is same as above. However, after cycling the key several times after returning from the long drive plus a 5 mile round trip to the mailbox, no DPF icon.

However, A new auto scan(below, readiness at bottom) shows one of the fault bits cleared in the freeze frame for the subject DTC. It also now shows the DTC as intermittent, but with same priority etc. My wife is due for a trip to town tomorrow so will see how it behaves. I have a few questions at this point:

1) Does the described behavior suggest any further steps I ought to take to narrow down the cause?
2) If I have to do another regen, what advanced measuring values should I monitor/graph to verify operation?
3) We are thinking we ought to have the smog check done now that the icon is gone... carpe diem and all that. Under the circumstances how long might it stay off?
4) Any other efforts to help me move this forward would be much appreciated.
5) Is there a way to clear this DTC without clearing readiness?

Code:
Wednesday,22,January,2025,15:38:00:29292
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 24.7.1.0 (x64)  HEX-V2 CB: 0.4643.4
Data version: 20240919 DS356.3
www.Ross-Tech.com


VIN: WAUKJAFM2DA032998   License Plate: 
Mileage: 160560km-99767mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: FM-AU35 (7N0)
Scan: 01 02 03 08 09 0F 15 16 17 19 25 42 44 46 47 4C 52 55 56 62
          72 77

VIN: WAUKJAFM2DA032998   Mileage: 160560km-99767miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
0F-Digital Radio -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: Malfunction 0010
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
4C-Tire Pressure II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: Cannot be reached 1100
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: Malfunction 0010
-------------------------------------------------------------------------------
Address 01: Engine (CBE)       Labels: 03L-906-022-CBE.clb
   Part No SW: 03L 997 030 A    HW: 03L 906 019 EJ
   Component: R4 2.0l TDI G000AG  9983  
   Revision: 12H15---    Serial number: AUX7Z0L7FN601G
   Coding: 0050078
   Shop #: WSC 42395 001 1048576
   VCID: 2C01086DBA0C11AAD33-8078
   VINID: 9D195B69159D0944400C224920A5628933

1 Fault Found:
006744 - NOx Catalyst 
               P1A58 - 000 - Regeneration Required - Intermittent
             Freeze Frame:
                    Fault Status: 00100000
                    Fault Priority: 6
                    Fault Frequency: 45
                    Reset counter: 255
                    Mileage: 159595 km
                    Time Indication: 0
                    Date: 2024.02.20
                    Time: 15:11:02

             Freeze Frame:
                    RPM: 828 /min
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Pressure: 943.8 mbar
                    Temperature: 9.0°C
                    Mass Air / Rev.: 285.0 mg/str
                    Temperature: 14.4°C

Readiness: 0 0 0 0 0 

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 02E-927-770.clb
   Part No SW: 02E 300 062 B    HW: 02E 927 770 AL
   Component: GSG DSG AG6     512 9430  
   Revision: 05551213    Serial number: 00001207020171
   Coding: 0000020
   Shop #: WSC 06314 000 00000
   VCID: 1471B08D027CA96AEB3-8040

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 1K0-907-379-60EC1F.clb
   Part No SW: 1K0 907 379 BL    HW: 1K0 907 379 BL
   Component: ESP MK60EC1   H31 0152  
   Revision: 00H31001    
   Coding: 1150400F492500FC881402ED92210042BF0C00
   Shop #: WSC 06314 000 00000
   VCID: 7DA7F5291DF6482234D-8028

1 Fault Found:
01325 - Control Module for Tire Pressure Monitoring (J502) 
            004 - No Signal/Communication - Intermittent
             Freeze Frame:
                    Fault Status: 00100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 75
                    Mileage: 159764 km
                    Time Indication: 0
                    Date: 2024.03.02
                    Time: 17:03:36

             Freeze Frame:
                    Count: 3
                    Count: 15
                    Count: 4096
                    Count: 16390
                    Count: 34816
                    Count: 11008
                    Count: 253
                    Count: 0


-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8P0-820-043.lbl
   Part No SW: 8P0 820 043 BM    HW: 8P0 820 043 BM
   Component: KlimavollautomatH09 0180  
   Revision: 000195      Serial number: 8P0820043BM   
   Shop #: WSC 00000 000 00000
   VCID: 78A9E43D3ED46D0A67B-802C

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 8P0-907-063.clb
   Part No SW: 8P0 907 063 Q    HW: 8P0 907 063 Q
   Component: BCM PQ35  M   111 0719  
   Revision: AM111715    
   Coding: 6E000A0FA01336E4287241E000100D4D401E62AA104DD128E40008840040
   Shop #: WSC 42395 001 1048576
   VCID: 42DD46D52488F7DA09F-8016

   Subsystem 1 - Part No SW: 8P1 955 119 F    HW: 8P1 955 119 F  Labels: 1KX-955-119.CLB
   Component: Wischer AU350  H11 0050 
   Coding: 00DD13

   Subsystem 2 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H05 1501 

2 Faults Found:
00446 - Function Limitation due to Under-Voltage 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 74
                    Mileage: 159764 km
                    Time Indication: 0
                    Date: 2024.03.02
                    Time: 17:18:00

             Freeze Frame:
                        Term 15 On
                    Voltage: 7.80 V
                        ON
                        ON
                        Term 50 Off
                        OFF
                        OFF

01134 - Alarm Horn (H12) 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 74
                    Mileage: 159764 km
                    Time Indication: 0
                    Date: 2024.03.02
                    Time: 17:18:01

             Freeze Frame:
                        Term 15 On
                    Voltage: 7.80 V
                        ON
                        ON
                        Term 50 Off
                        OFF
                        OFF


-------------------------------------------------------------------------------
Address 0F: Digital Radio        Labels: 8E0-035-593-SIR.lbl
   Part No SW: 8E0 035 593 P    HW: 8E0 035 593 P
   Component: SDAR SIRIUS     H07 0160  
   Revision: 00000000    Serial number: AUZ4Z7M0621430
   Coding: 0000100
   Shop #: WSC 06314 000 00000
   VCID: 36352A0574405B7AB57-8062

2 Faults Found:
02635 - Tuner Not Enabled/Activated 
            000 - -
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 7
                    Fault Frequency: 1
                    Reset counter: 20
                    Mileage: 158837 km
                    Time Indication: 0
                    Date: 2024.01.22
                    Time: 18:02:13

01304 - Radio 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 5
                    Fault Frequency: 23
                    Reset counter: 40
                    Mileage: 160169 km
                    Time Indication: 0
                    Date: 2024.03.19
                    Time: 13:48:24


-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 8P0-959-655-10.clb
   Part No SW: 8P0 959 655 Q    HW: 8P0 959 655 Q
   Component: Airbag AU1042 H10 0250  
   Revision: --------    Serial number: 003FC001VJPK Dataset Number: 8P0909602N  0004
   Coding: 303142393041303030374A55304C38503053
   Shop #: WSC 06314 000 00000
   ASAM Dataset: EV_Airba10AURB4 001001
   ROD: EV_Airba10AURB4_AU35.rod
   VCID: 50F97C9DFA64154A8FB-8004

   Seat occupied recognition: 
   Subsystem 1 - Part No SW: 8P0 959 339 E    HW: 8P0 959 339 E
   Component: BF-Gewichtss.  H04 0040 
   Serial number: 5850000R1271100A4S
   Coding: 000000

   Crash sensor for side airbag: driver side: 
   Serial number: 3572DRB40000EBACB9BL

   Front Passenger's Side Airbag Crash Sensor: 
   Serial number: 3582DRB40000EBD0B889

   Rear Side Airbag Crash Sensor (on driver's side): 
   Serial number: 35128RB400006CA899E0

   Passenger side rear thorax airbag crash sensor: 
   Serial number: 35228RB400006CA59AE%

   Crash sensor for front airbag: driver side: 
   Serial number: 35547RB400006CA22C7V

   Crash sensor for front airbag: front passenger side: 
   Serial number: 35647RB400006CA22C8X

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8P0-953-549.lbl
   Part No SW: 8P0 953 549 K    HW: 8P0 953 549 K
   Component: J0527           H38 0070  
   Coding: 0014142
   Shop #: WSC 06314 000 00000
   VCID: 46D55AC504A0CBFA257-8012

   Subsystem 1 - Part No: XXXXXXXXXXX 
   Component: E0221           H02 0100

1 Fault Found:
01304 - Radio 
            004 - No Signal/Communication

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 8P0-920-xxx-17-MY8.clb
   Part No SW: 8P0 920 983 L    HW: 8P0 920 983 L
   Component: KOMBIINSTR. VDO H03 0380  
   Revision: D0H03005    Serial number: 2247L005001963
   Coding: 0272288
   Shop #: WSC 12345 123 12345
   VCID: 43D343D13792FED2029-8016

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 7N0-907-530-V2.clb
   Part No SW: 7N0 907 530 R    HW: 7N0 907 530 H
   Component: J533  Gateway H42 1632  
   Revision:   H42       Serial number: 190712F1001001
   Coding: 352102
   Shop #: WSC 06314 000 00000
   VCID: 3FDB4F21577A9A32661-806A

1 Fault Found:
01304 - Radio 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 20
                    Mileage: 158837 km
                    Time Indication: 0
                    Date: 2024.01.22
                    Time: 18:02:07


-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
   Part No SW: 8P0 920 983 L    HW: 8P0 920 983 L
   Component: KOMBIINSTR. VDO H03 0380  
   Revision: D0H03005    Serial number: AUX7Z0L7FN601G
   Shop #: WSC 00000 000 00000
   VCID: 43D343D13792FED2029-8016

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 8P0-959-801-MIN3.lbl
   Part No SW: 8P0 959 801 Q    HW: 8P0 959 801 Q
   Component: Tuer-SG         H04 0101  
   Coding: 0001181
   Shop #: WSC 06314 000 00000
   VCID: 49CF51F915BE2482C85-801C

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
   Part No: 1K0 909 144 P
   Component: EPS_ZFLS Kl. 232    3305  
   Revision: 00H22000    
   Shop #: WSC 02069 000 90108
   VCID: 372B2701734AA272AE1-8062

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System        Labels: 8Px-035-382.lbl
   Part No SW: 8P4 035 382 E    HW: 8P4 035 382 E
   Component: AB2 SUBWOOFERBOXH07 0180  
   Revision: 00006       Serial number: 92158230628875
   Shop #: WSC 00000 000 00000
   VCID: 36352A0574405B7AB57-8062

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels:. 1K0-959-702-MIN3.clb
   Part No SW: 8P0 959 802 Q    HW: 8P0 959 802 Q
   Component: Tuer-SG         H04 0101  
   Coding: 0001181
   Shop #: WSC 06314 000 00000
   VCID: 4ACD6EF510B82F9AC1F-801E

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range (J431)       Labels:| 8X0-907-357.clb
   Part No SW: 8X0 907 357 C    HW: 8X0 907 357 B
   Component: ****LWR12**** H02 0020  
   Serial number: 120727-0002-066
   Coding: 1163951010020400
   Shop #: WSC 06314 000 00000
   ASAM Dataset: EV_HeadlRegulBasic 005001
   ROD: EV_HeadlRegulBasic.rod
   VCID: 42DD46D52408F7DA09F-8016

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio
Cannot be reached

-------------------------------------------------------------------------------
Address 62: Door, Rear Left        Labels: 8P4-959-801.lbl
   Part No SW: 8P4 959 801 F    HW: 8P4 959 801 F
   Component: Tuer-SG         H04 0050  
   Coding: 0001176
   Shop #: WSC 06314 000 1012544
   VCID: 42DD46D52888F7DA09F-8016

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right        Labels: 8P4-959-802.lbl
   Part No SW: 8P4 959 802 F    HW: 8P4 959 802 F
   Component: Tuer-SG         H04 0050  
   Coding: 0001176
   Shop #: WSC 06314 000 1012544
   VCID: 43D343D13792FED2029-8016

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 8P0-862-335.lbl
   Part No SW: 8P1 862 336 A    HW: 8P1 862 336 
   Component: FSE_256x BT     H44 0660  
   Revision: 00000000    Serial number: 00000005175360
   Coding: 0001277
   Shop #: WSC 06314 000 00000
   VCID: 36352A0574405B7AB57-8062

2 Faults Found:
02503 - Output Wire to Radio 
            011 - Open Circuit
             Freeze Frame:
                    Fault Status: 01101011
                    Fault Priority: 5
                    Fault Frequency: 1
                    Reset counter: 20
                    Mileage: 158837 km
                    Time Indication: 0
                    Date: 2024.01.22
                    Time: 18:01:04

01304 - Radio 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 6
                    Fault Frequency: 105
                    Reset counter: 42
                    Mileage: 158837 km
                    Time Indication: 0
                    Date: 2024.01.22
                    Time: 18:01:04


End----------(Elapsed Time: 01:23, VBatt start/end: 13.6V/13.6V)-----------


--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Readiness Status: 00000000 00001111 11101011 00000000
MIL Status: MIL OFF
Comprehensive Components: Passed
Fuel System: Passed
Exhaust Gas Recirculation: Passed
Number of EOBD-related DTC(s): 0
 
   #12  

SaVAGeSoot

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After about 25 minutes the icon disappeared from the dash
So you decided to shorten the regen cycle because you disagree with the tech docs, or why? :confused:
Tech Tip said:
The regeneration takes approx. 40 - 50 minutes.
 
   #13  

Uwe

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It also now shows the DTC as intermittent,
That means the fault condition that set the fault is no longer present. If you weren't heading for an emissions inspection, I'd suggest clearing faults directly in 01-Engine, but that will also mess with Readiness, which is probably undesirable right now.

We are thinking we ought to have the smog check done now that the icon is gone..
Nope.

Is there a way to clear this DTC without clearing readiness?
Use the Generic OBD-II function in VCDS. Check Mode 3 and Mode 7 for Pending and Current DTCs. Then check Readiness there as well. Generic OBD-II is what will be used by a "smog check".

-Uwe-
 
   #14  

Frau_Blau

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So you decided to shorten the regen cycle because you disagree with the tech docs, or why? :confused:

After about 25 minutes the icon disappeared from the dash. At this point MBV 104 was 0xFF01 and it stayed that way for a little more than another hour of driving.
Actually if you parse what I said, what I said was that I ran this regen for more like 90 minutes since I was not seeing the expected code.
 
   #15  

Frau_Blau

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That means the fault condition that set the fault is no longer present. If you weren't heading for an emissions inspection, I'd suggest clearing faults directly in 01-Engine, but that will also mess with Readiness, which is probably undesirable right now.


Nope.


Use the Generic OBD-II function in VCDS. Check Mode 3 and Mode 7 for Pending and Current DTCs. Then check Readiness there as well. Generic OBD-II is what will be used by a "smog check".

-Uwe-
I will try as you suggest and post results. Thank you for the help.
 
   #16  

SaVAGeSoot

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Actually if you parse what I said, what I said was that I ran this regen for more like 90 minutes since I was not seeing the expected code.
So you're saying you kept on cruise control at 2.2k RPM for the whole 90 min? :confused:
 
   #17  

Frau_Blau

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So you're saying you kept on cruise control at 2.2k RPM for the whole 90 min? :confused:
Yes. I did have to drop speed to ~55mph a couple of times briefly(via cruise control stalk) in order to avoid leaving the RPM range since there was some traffic. Never below ~2100RPM though. Second regen, same except I only ran for 80 minutes.
 
   #18  

Frau_Blau

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That means the fault condition that set the fault is no longer present. If you weren't heading for an emissions inspection, I'd suggest clearing faults directly in 01-Engine, but that will also mess with Readiness, which is probably undesirable right now.


Nope.


Use the Generic OBD-II function in VCDS. Check Mode 3 and Mode 7 for Pending and Current DTCs. Then check Readiness there as well. Generic OBD-II is what will be used by a "smog check".

-Uwe-

@Uwe Nothing found via generic OBD2. Does this alter your skepticism about getting a smog check? If not, what would you suggest as next steps?

Code:
Thursday,23,January,2025,12:19:15:29292
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 24.7.1.0 (x64)  HEX-V2 CB: 0.4643.4
Data version: 20240919 DS356.3
www.Ross-Tech.com


VIN: WAUKJAFM2DA032998   License Plate: 
Mileage:    Repair Order: OBD2-03



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Mode 03: Emission related fault codes

Address 7E8: No fault code found.

Address 7E9: No fault code found.


--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Mode 07: Pending emission related fault codes

Address 7E8: No fault code found.

Address 7E9: No fault code found.


--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Mode 01 - PID 01 : Readiness  --  Address 7E8

Number of DTCs stored: 0  --  MIL Status: MIL OFF
Misfire monitoring:  Passed
Fuel System:  Passed
Comprehensive Components:  Passed
Catalyst monitoring:  Passed
Heated catalyst monitoring:  Passed
Evaporative system monitoring: Not installed.
Secondary air system monitoring:  Passed
A/C system refrigerant monitoring: Not installed.
Oxygen sensor monitoring:  Passed
Oxygen sensor heater monitoring:  Passed
Exhaust Gas Recirculation:  Passed
 
   #19  

SaVAGeSoot

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What do the readiness bits show?
 
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