P1A58 NOx Regen Required - Code Definition Needed - 2012 Jetta CJAA

[B8 Estate]

VW/Audi Independent shop with a customer's 2012 Jetta TDI CJAA. We have made some emissions repairs and are hung up on the last one. P1A58 NOx Regeneration Required. The DPF light goes on and off while driving, a hard code of P1A58 is present and will not clear, even after several attempts to perform regeneration using both VCDS, and Autel Elite.

On VCDS, after security access it populates a window saying you change new value to "1" and click Save. The Save & Test buttons are grayed out. I have to assume conditions are not met for this long adaptation to be performed?

The long story is this vehicle had a bad turbo temperature sensor (G235) and was driven long enough to clog the DPF. I replaced the DPF, reset ash content as instructed when replacing the DPF with new assembly, and this code is now present. Any dealership techs with definitions about this code, or code setting criteria is what I'm after. I need to figure out why the car is not accepting regen attempts.

Lastly, the Autel performed this regen several times stating at the end of the test that it was "Successful", yet the code will not clear and the Hex value won't change on MVB 104. I can't even get the regen to start on VCDS.

 

[Uwe]

Hi and welcome.

Please post an Auto-Scan for context.

-Uwe-

 

[B8 Estate]

Hi and welcome.

Please post an Auto-Scan for context.

-Uwe-

Thank you! I considered posting log file, but I'm so tunnel visioned to find out the code definition, then attack the problem with this car.

Chassis Type: AJ-VW36 (6N0)
Scan: 01 02 03 08 09 15 17 19 25 2E 44 47 56 77

VIN: 3VWLL7AJ5CM321566   Mileage: 236720km-147090miles

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: Malfunction 0010
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: Malfunction 0010
17-Instruments -- Status: Malfunction 0010
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
2E-Media Player 3 -- Status: Malfunction 0010
44-Steering Assist -- Status: OK 0000
47-Sound System -- Status: Malfunction 0010
56-Radio -- Status: Malfunction 0010
77-Telephone -- Status: Malfunction 0010
-------------------------------------------------------------------------------
Address 01: Engine (CJA)       Labels: 03L-906-022-CBE.clb
   Part No SW: 03L 997 030 M    HW: 03L 907 309 AA
   Component: R4 2.0l TDI G000AG  9983  
   Revision: 12H14---    Serial number:               
   Coding: 0050078
   Shop #: WSC 03709 003 1048576
   VCID: 383CC6964B17A346F3-806C

2 Faults Found:
006744 - NOx Catalyst 
               P1A58 - 000 - Regeneration Required - Intermittent
             Freeze Frame:
                    Fault Status: 00100000
                    Fault Priority: 6
                    Fault Frequency: 89
                    Reset counter: 255
                    Mileage: 236536 km
                    Time Indication: 0
                    Date: 2014.12.08
                    Time: 10:16:06

             Freeze Frame:
                    RPM: 828 /min
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Pressure: 968.0 mbar
                    Temperature: 24.3°C
                    Mass Air / Rev.: 310.0 mg/str
                    Temperature: 48.6°C

006480 - Radiator Fan (V7) 
               P1950 - 000 - Movement Restricted / Jammed
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 2
                    Fault Frequency: 87
                    Reset counter: 255
                    Mileage: 236536 km
                    Time Indication: 0
                    Date: 2014.12.08
                    Time: 10:16:07

             Freeze Frame:
                    RPM: 805 /min
                    Speed: 0.0 km/h
                    Temperature: 48.6°C
                    Temperature: 65.7°C
                    Temperature: 24.3°C
                    Lambda: 86.8 %
                    Lambda: 0.0 %

Readiness: 0 0 0 0 0 

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 02E-927-770.clb
   Part No SW: 02E 300 057 A    HW: 02E 927 770 AL
   Component: GSG DSG AG6     511 9334  
   Revision: 05351113    Serial number: 00001106181429
   Coding: 0000020
   Shop #: WSC 00066 000 00000
   VCID: 177E252A26C98C3EDA-8042

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 1K0-907-379-60EC1F.clb
   Part No SW: 1K0 907 379 BJ    HW: 1K0 907 379 BJ
   Component: ESP MK60EC1   H31 0121  
   Revision: 00H31001    
   Coding: B14B400C492400FB8D1002EA921F0042A70000
   Shop #: WSC 00066 000 00000
   VCID: 7BB6199AFAA1485E5E-802E

2 Faults Found:
00668 - Supply Voltage Terminal 30 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 82
                    Mileage: 236064 km
                    Time Indication: 0
                    Date: 2014.08.21
                    Time: 23:09:37

             Freeze Frame:
                    Count: 7
                    Count: 13
                    Count: 4096
                    Count: 128
                    Count: 28672
                    Count: 0
                    Count: 252
                    Count: 0

01325 - Control Module for Tire Pressure Monitoring (J502) 
            004 - No Signal/Communication - Intermittent
             Freeze Frame:
                    Fault Status: 00100100
                    Fault Priority: 2
                    Fault Frequency: 3
                    Reset counter: 92
                    Mileage: 236064 km
                    Time Indication: 0
                    Date: 2014.08.21
                    Time: 22:57:34

             Freeze Frame:
                    Count: 3
                    Count: 13
                    Count: 20480
                    Count: 16390
                    Count: 34304
                    Count: 0
                    Count: 253
                    Count: 0


-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 5C0-820-047.clb
   Part No SW: 5C0 820 047 AQ    HW: 5C0 820 047 AQ
   Component: J301  Klimaanlage   0203  
   Revision: 2001010S    Serial number: 00000000520863
   Shop #: WSC 00066 000 00000
   VCID: 6FAE3DCA7ED924FEE2-803A

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: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Time Indication: 0
                    Date: 2014.08.21
                    Time: 23:08:14

00532 - Supply Voltage B+ 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 3
                    Fault Frequency: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Time Indication: 0
                    Date: 2014.08.21
                    Time: 23:08:14


-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 6R0-937-08x-09.clb
   Part No SW: 5C0 937 087 E    HW: 5C0 937 087 A
   Component: BCM25 JLB H3  H66 0257  
   Revision: B2066001    Serial number: 04371232110119
   Coding: 7B994B9A08AB0B0008382000240884C50082502E60000000300000000000
   Shop #: WSC 03709 003 1048576
   VCID: 2F2EFDCA7E5964FEA2-807A

   Subsystem 1 - Part No SW: 6R0 959 801 M    HW: 6R0 959 801 M  Labels: 6R0-959-801.CLB
   Component: J386__TSG_FT  002 3464 
   Serial number: --------------------
   Coding: 820000

   Subsystem 2 - Part No SW: 6R0 959 802 P    HW: 6R0 959 802 P  Labels: 6R0-959-802.CLB
   Component: J387__TSG_BT  002 3464 
   Serial number: --------------------
   Coding: 820000

   Subsystem 3 - Part No SW: 5K0 959 591     HW: 5K0 959 591 
   Component: J245 PS41.019  H08 0006 
   Serial number:     WRH0002VP0S     
   Coding: 180000

   Subsystem 4 - Part No SW: 5K0 959 542 A    HW: 5K0 959 542 A
   Component: E221__MFL-TAS  H09 0013 
   Serial number: 0411907             
   Coding: 020000

   Subsystem 5 - Part No SW: 6R0 959 811 D    HW: 6R0 959 811 D
   Component: J388__TSG_HL  002 3464 
   Serial number: --------------------
   Coding: 800000

   Subsystem 6 - Part No SW: 6R0 959 812 D    HW: 6R0 959 812 D
   Component: J389__TSG_HR  002 3464 
   Serial number: --------------------
   Coding: 800000

4 Faults Found:
00532 - Supply Voltage B+ 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 3
                    Fault Frequency: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Time Indication: 0
                    Date: 2014.08.21
                    Time: 23:08:42

00446 - Function Limitation due to Under-Voltage 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 6
                    Fault Frequency: 4
                    Reset counter: 85
                    Mileage: 236064 km
                    Time Indication: 0
                    Date: 2014.08.21
                    Time: 23:07:43

00447 - Function Limitation due to Over-Voltage 
            001 - Upper Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100001
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 82
                    Time Indication: 0

03587 - Control Circuit for Starter Lock Lock 
            007 - Short to Ground - Intermittent
             Freeze Frame:
                    Fault Status: 00100111
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 82
                    Time Indication: 0


-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:| 5K0-959-655.clb
   Part No SW: 5C0 959 655 E    HW: 5C0 959 655 E
   Component: AirbagVW10G   013 0807  
   Serial number: 003GTM01F1EF  
   Coding: 00003936
   Shop #: WSC 00066 000 00000
   ASAM Dataset: EV_AirbaVW10SMEVW360 A01020
   ROD: EV_AirbaVW10SMEVW360.rod
   VCID: 3424F2A69F7F4726DF-8060

   Seat occupied recognition: 
   Subsystem 1 - Part No SW: 5C6 959 339     HW: 5C6 959 339 
   Component: BF-Gewichtss.  H10 0027 
   Serial number: 6940000Y1100006JLH0W
   Coding: 303241

   Crash sensor for side airbag: driver side: 
   Subsystem 2 - Part No SW: 5K0 959 354     HW: 5K0 959 354 
   Component: S.Sens.Fahr.V  H01 ---- 
   Serial number: 3572MSME7E4F7060ZZZ3

   Crash sensor for side airbag: front passenger side: 
   Subsystem 3 - Part No SW: 5K0 959 354     HW: 5K0 959 354 
   Component: S.Sens.Beif.V  H01 ---- 
   Serial number: 3582MSME4B2B7160ZZZ-

   Crash sensor for side airbag: rear: driver side: 
   Subsystem 4 - Part No SW: 5K0 959 351 A    HW: 5K0 959 351 A
   Component: S.Sens.Fahr.H  H02 ---- 
   Serial number: 3516KSME4A060712ZZZJ

   Crash sensor for side airbag: rear: passenger side: 
   Subsystem 5 - Part No SW: 5K0 959 351 A    HW: 5K0 959 351 A
   Component: S.Sens.Beif.H  H02 ---- 
   Serial number: 3526KSME3F164111ZZZM

   Crash sensor for front airbag: driver side: 
   Subsystem 6 - Part No SW: 5K0 959 659 A    HW: 5K0 959 659 A
   Component: F.Sens.Fahr  H02 ---- 
   Serial number: 3556LSME23155610ZZZH

   Crash sensor for front airbag: front passenger side: 
   Subsystem 7 - Part No SW: 5K0 959 659 A    HW: 5K0 959 659 A
   Component: F.Sens.Beif  H02 ---- 
   Serial number: 3566LSME4040390FZZZU

3 Faults Found:
9445892 - Seat occupied recognition control module 
          B1022 04 [137] - Internal System Fault
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 147094 km
                    Date: 2018.08.20
                    Time: 12:56:20

13635840 - Supply voltage 
          U1011 00 [008] - Voltage too Low
          [Powersupply  lower threshold fall short of]
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Date: 2020.03.30
                    Time: 22:58:33

9483264 - Seat Occupied Recognition 
          B10B4 00 [008] - Function Restriction due to Undervoltage
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Date: 2020.03.30
                    Time: 22:57:49


-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:| 5K0-920-xxx-17.clb-SRI1
   Part No SW: 5C6 920 951 A    HW: 5C6 920 951 A
   Component: KOMBI         H04 0604  
   Serial number: 00000000000000
   Coding: 270A01
   Shop #: WSC 00066 000 00122
   ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04114
   ROD: EV_Kombi_UDS_VDD_RM09_004_VW32.rod
   VCID: 291A13D248BD0ACE7C-807C

1 Fault Found:
13635840 - Supply voltage 
          U1011 00 [008] - Voltage too Low
          [Supply voltage too low]
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Date: 2020.03.30
                    Time: 23:08:22


-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 6N0-909-901-6R.clb
   Part No SW: 6N0 909 901     HW: 5C0 937 087 A
   Component: GW-K-CAN TP20 H66 0257  
   Revision: B2066001    
   Coding: 102200
   Shop #: WSC 03709 003 1048576
   VCID: 70AC3EB6A3E73B06FB-8024

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer (J334)       Labels:| 5K0-920-xxx-25.clb
   Part No SW: 5K0 953 234     HW: 5K0 953 234 
   Component: IMMO          H04 0604  
   Serial number:               
   Coding: 000000
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03009
   ROD: EV_Immo_UDS_VDD_RM09_VW31.rod
   VCID: 6A982CDE8D3BC1D6B5-803E

No fault code found.

-------------------------------------------------------------------------------
Address 2E: Media Player 3 (J650)       Labels:. 5N0-035-342.lbl
   Part No SW: 5N0 035 342 E    HW: 5N0 035 342 E
   Component: SG EXT.PLAYER H13 0240  
   Revision: A1001003    Serial number: 7660365778    
   Coding: 010000
   Shop #: WSC 00066 000 00000
   VCID: 291A13D240BD0ACE7C-807C

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: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Time Indication: 0
                    Date: 2014.08.21
                    Time: 23:05:32

00532 - Supply Voltage B+ 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 2
                    Fault Frequency: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Time Indication: 0
                    Date: 2014.08.21
                    Time: 23:07:34


-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
   Part No: 1K0 909 144 M
   Component: EPS_ZFLS Kl. 70     3201  
   Revision: 00H20000    
   Shop #: WSC 02069 000 90108
   VCID: 3424F2A6577F4726DF-8060

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System (R12)       Labels: 5K0-035-456.clb
   Part No SW: 3T0 035 456 B    HW: 3T0 035 456 B
   Component: KonzernAmp10K H06 0362  
   Revision: --------    Serial number: BP225319890674
   ASAM Dataset: EV_AudioVerst10KanalSTT3 S01001
   ROD: EV_AudioVerst10KanalSTT3_VW32.rod
   VCID: 302CFEB66B677B06BB-8064

1 Fault Found:
13893632 - Function Restricted due to Insufficient Voltage 
          U1400 00 [008] - -
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 5
                    Fault Frequency: 1
                    Reset counter: 82
                    Mileage: 236064 km
                    Date: 2020.03.30
                    Time: 23:06:58


-------------------------------------------------------------------------------
Address 56: Radio (J503)       Labels:. 5M0-035-1xx-56.clb
   Part No SW: 1K0 035 180 AE    HW: 1K0 035 180 AE
   Component: Radio Prem-8  H02 0016  
   Revision: -----16S    Serial number: VWZ4Z7L3195442
   Coding: 01020000010006
   Shop #: WSC 00066 000 00000
   VCID: 638641FA6211909E76-8036

3 Faults Found:
02635 - Tuner Not Enabled/Activated 
            000 - -
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 7
                    Fault Frequency: 16
                    Reset counter: 54
                    Mileage: 191004 km
                    Time Indication: 0
                    Date: 2013.08.02
                    Time: 16:55:57

00446 - Function Limitation due to Under-Voltage 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 3
                    Fault Frequency: 1
                    Reset counter: 82
                    Mileage: 236064 km
                    Time Indication: 0
                    Date: 2014.08.21
                    Time: 22:57:50

00532 - Supply Voltage B+ 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 3
                    Fault Frequency: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Time Indication: 0
                    Date: 2014.08.21
                    Time: 23:08:12


-------------------------------------------------------------------------------
Address 77: Telephone (J412)       Labels:| 7P6-035-730.clb
   Part No SW: 7P6 035 730 F    HW: 7P6 035 730 F
   Component: TELEFON       H09 2902  
   Revision: 1B001001    Serial number: 00007669965444
   Coding: 0A10040000010110
   Shop #: WSC 01383 790 50316
   ASAM Dataset: EV_UHVNA A01719
   ROD: UHVNA.rod
   VCID: 3522CFA294055E2EE8-8060

2 Faults Found:
13635840 - Supply voltage 
          U1011 00 [008] - Voltage too Low
          [Klemme 30: unterer Grenzwert unterschritten]
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 3
                    Fault Frequency: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Date: 2020.03.30
                    Time: 23:08:18

13893632 - Function Restricted due to Insufficient Voltage 
          U1400 00 [008] - -
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 2
                    Reset counter: 85
                    Mileage: 236064 km
                    Date: 2020.03.30
                    Time: 23:08:18


End----------(Elapsed Time: 01:28, VBatt start/end: 12.1V/12.1V)-----------

 

[Uwe]

Perhaps I'm grasping at straws here, but the Radiator Fan code might need to be cleared (and the fault dealt with if it won't clear or won't stay cleared) before you can do the NOx regen.

Is it safe to assume you're doing it in Adaptation Channel 18 and then driving the car as prescribed?

-Uwe-

 

[MartinsX]

If actual cooling system fault codes are present, DPF and/or NOx catalyst regenerations may not be allowed or may not finish successfully in VAG as well as in other brand vehicles.

 

[B8 Estate]

Perhaps I'm grasping at straws here, but the Radiator Fan code might need to be cleared (and the fault dealt with if it won't clear or won't stay cleared) before you can do the NOx regen.

Is it safe to assume you're doing it in Adaptation Channel 18 and then driving the car as prescribed?

-Uwe-

UWE, yes I've searched for every possible prerequisite to this test. I did have to replace the thermostat that would not heat up to the minimum 188F before attempting this procedure.

The cooling fan code is in fact a real fault. The driver's side cooling fan motor is dead. I found on another thread in the TDI forums that this is not a problem to proceed. Customer insisted he do this repair himself, but this is EXACTLY why I'm after the code definitions. If I can see an engineer written article on what can/can't be present, conditions that must be met, etc. then I should know why this regeneration is failing to complete. I don't even have PID goals to monitor to see if the regen is working.

 

[Uwe]

this is EXACTLY why I'm after the code definitions. If I can see an engineer written article on what can/can't be present, conditions that must be met, etc. then I should know why this regeneration is failing to complete.

Documentation like that is not easy to come by. I certainly don't have it.

-Uwe-

 

[Mr. M]

There is a VW Tech Tip which may help with this. Try searching for "VW 2057073" if you have not already.

I would agree with Uwe and MartinsX though.

 

[B8 Estate]

There is a VW Tech Tip which may help with this. Try searching for "VW 2057073" if you have not already.

I would agree with Uwe and MartinsX though.

Yes, thank you. We have Identifix which gives us this Tech Tips and all TSBs on the vehicle. We also have digital versions of the Bentley manual at our fingertips. Just like the dealerships would. I'm hoping someone out there has ODIS that has a updated info or something about this code.

Code definitions are easy to find in this program and in the Bentley repair manuals. Even Chilton manuals have these definitions. This code is new as of the lawsuit and diesel fix they applied.

I'm still working with the VW Techline to resolve this also.

 

[B8 Estate]

If actual cooling system fault codes are present, DPF and/or NOx catalyst regenerations may not be allowed or may not finish successfully in VAG as well as in other brand vehicles.

This customer is a well versed car guy, so he is going to replace the cooling fan and clear the fault code of P1950. I want the car gone, he wants it back. So we agreed he will do this repair himself, drive it for a month to see if the regeneration will occur on it's own, and report back to me. I'll report back here as soon as I get the info!

 

[B8 Estate]

***FIXED***

Great news! This customer did not end up repairing the cooling fan P1950 code, but they drove the car for about 3-4k miles and the DPF light and fault have cleared and have stayed off for months now. No more P1A58. I believe the continued regens while driving have cleared up the NOx Catalyst.

Customer is happy, internet is happy, I'm happy this is resolved! Thank you all for your help.