Q5 2.0TDI reductant agent tank level issue

   #1  

fast79

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Hello!

Car is 2015 Q5 2.0TDI. I got a message "refill adblue" and 2400km left to drive. I've got this message many times in past months and I'm 100% sure that the reducing agent tank is full. I used to fill the tank every time when I got the message and last time it overfilled so it's definitely full. I have done the scr tank level reset three times and the warning goes off. I've also reset scr lock. Now it's been only two weeks since last reset and the warning is on again. I checked the fill level in measuring blocks and it's a bit over 96%. Is there a faulty tank level sensor or is there something else wrong? There's no fault codes and the reductant system works fine except this issue.

Here's full scan:

Code:
Chassis Type: 8R-AU48 (8R0)
Scan: 01 02 03 05 08 09 15 16 17 18 19 42 44 46 52 53 56 62 69 6D
          72 77 AC

VIN: WAUZZZ8R6GA025166   Mileage: 185840km-115475miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
18-Aux. Heat -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
69-Trailer -- Status: OK 0000
6D-Trunk Elect. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: OK 0000
AC-Reductant Control -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine (J623-CNHA)       Labels:. 04L-907-309-V1.clb
   Part No SW: 04L 906 021 CK    HW: 04L 907 309 
   Component: R4 2,0L EDC   H23 8507  
   Revision: 85H23---    
   Coding: 2A25401A243601080000
   Shop #: WSC 06208 000 00000
   ASAM Dataset: EV_ECM20TDI01104L906021CK 002009
   ROD: EV_ECM20TDI01104L906021CK_002.rod
   VCID: 70EFDB9CABA04206E3-8024

No fault code found.
Readiness: 0 0 0 0 0 

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217)       Labels:| 0B5-927-156.clb
   Part No SW: 8R2 927 156 M    HW: 0B5 927 156 K
   Component: 0B5 20 TDIRdW H03 0004  
   Revision: --H03---    
   Coding: 000001
   Shop #: WSC 06335 000 00000
   ASAM Dataset: EV_TCMDL501021 001016
   ROD: EV_TCMDL501021.rod
   VCID: 479D5040FEAEA5BE92-8012

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 8R0-907-379-V2.clb
   Part No SW: 8R0 907 379 BA    HW: 8R0 907 379 BA
   Component: ESP8 quattro  H09 0020  
   Revision: --------    Serial number: --------------
   Coding: 2CDDCC01
   Shop #: WSC 06335 000 00000
   VCID: 000F8B5C9300528613-8054

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393)       Labels:. 8K0-907-064-05.clb
   Part No SW: 8K0 907 064 KG    HW: 8K0 907 064 KG
   Component: BCM2 2.0      H15 0711  
   Revision: 00002001    
   Coding: 01A54000000000000000
   Shop #: WSC 06335 000 00000
   VCID: 7F0D08A0EEFE2D7E6A-802A

   Subsystem 1 - Part No SW: 8K0 959 754 H    HW: 8K0 959 754 H
   Component: FBSAUDIB8 IDG  H71 0083 
   Serial number: 0815000075584009    

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255)       Labels: Redir Fail!
   Part No SW: 8K1 820 043 AT    HW: 8K1 820 043 AT
   Component: KLIMA 1 ZONE  H02 0123  
   Revision: A1000000    Serial number: 01290620150347
   Coding: 342900A000
   Shop #: WSC 06335 000 00000
   VCID: 7AFBF9B4F5DC08565D-802E

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 8K0-907-063.clb
   Part No SW: 8K0 907 063 DH    HW: 8K0 907 063 DH
   Component: BCM1 1.0      H16 0103  
   Revision: 08016001    Serial number: 00001105256601
   Coding: 2600C01080348FC00781400300001D0D001C670826090201000004004401030100000020000000
   Shop #: WSC 06335 123 12345
   VCID: 78FFE3BCCBD01A462B-802C

   Subsystem 1 - Part No SW: 8R1 955 119 A    HW: 8R1 955 119   Labels: 1KX-955-119.CLB
   Component: WWS416 150619  H12 0050 
   Serial number: 90243014150614024932
   Coding: 01DD13

   Subsystem 2 - Part No SW: 8U0 955 559 C    HW: 8U0 955 559 B  Labels: 8U0-955-559.CLB
   Component: G397_RLFS  H06 0004 
   Serial number: 20393614            
   Coding: 02005C

   Subsystem 3 - Part No SW: 8K0 941 531 AS    HW: 8K0 941 531 AS
   Component: E1 - LDS  H03 0031 
   Serial number: 00000000001706150884

   Subsystem 4 - Part No SW: 4G0 907 658 A    HW: 4G0 907 658 A
   Component: Humidity_Sens  H03 0002 
   Serial number: EA68C4B7000000000001

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 8R0-959-655.clb
   Part No SW: 8R0 959 655 G    HW: 8R0 959 655 G
   Component: AirbagVW-AU10 H49 0610  
   Serial number: 003JPDD06M1G  
   Coding: 30463531313030303030554A304C38523053
   Shop #: WSC 06335 000 00000
   ASAM Dataset: EV_AirbaAU10SMEAU416 002004
   ROD: EV_AirbaAU10SMEAU416.rod
   VCID: 489F537CF3B0AAC69B-801C

   Crash sensor for side airbag: driver side: 
   Serial number: 6334MSME526C740CL

   Crash sensor for side airbag: front passenger side: 
   Serial number: 6344MSME526D1939M

   Crash sensor for side airbag: rear: driver side: 
   Serial number: 6352QSME04542B74E

   Crash sensor for side airbag: rear: passenger side: 
   Serial number: 6362QSME5E533A48U

   Crash sensor for front airbag: driver side: 
   Serial number: 63732SME3E584F60B

   Crash sensor for front airbag: front passenger side: 
   Serial number: 63832SME4958444A5

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel (J527)       Labels:. 8K0-953-568.clb
   Part No SW: 8K0 953 568 Q    HW: 8K0 953 568 Q
   Component: Lenks.Modul   H03 0003  
   Revision: C0062331    Serial number: 90862OFT001DM 
   Coding: 000017
   Shop #: WSC 06335 000 00000
   VCID: 489F537CFBB0AAC69B-801C

   Component: E221 - MFL  H03 0004 

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:. 8R0-920-xxx-17.clb
   Part No SW: 8R0 920 932     HW: 8R0 920 932 
   Component: KOMBIINSTR.   H36 0567  
   Revision: 00100000    Serial number: 037465Z3G     
   Coding: 138F220003010008010000
   Shop #: WSC 06335 000 00000
   VCID: 73E5D490D2B6791E1E-8026

No fault code found.

-------------------------------------------------------------------------------
Address 18: Aux. Heat (J364)       Labels:. 8R0-265-105.clb
   Part No SW: 4H0 265 105 J    HW: 4H0 265 105 J
   Component: Standheizung  H26 0260  
   Revision: 77007007    Serial number: 20150613020640
   Coding: 554501
   Shop #: WSC 06335 123 12345
   VCID: 2959F6F840FA73CE64-807C

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 8T0-907-468.clb
   Part No SW: 8R0 907 468 R    HW: 8R0 907 468 A
   Component: GW-BEM 5CAN   H11 0070  
   Revision: 1V100031    Serial number: 3141V156070A5F
   Coding: 80CF07FF00
   Shop #: WSC 06335 000 00000
   VCID: 4E93656419D474F6D1-801A

   Subsystem 1 - Part No SW: 8R0 915 181 C    HW: 8R0 915 181 C
   Component: J367-BDMHella  H07 8043 
   Serial number: 9642617003          

   Subsystem 2 - Part No SW: 8K0 959 663 B    HW: 8K0 959 663 B
   Component: J532_DCDCStab  H05 0006 
   Serial number: 15177002620011200410

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels:. 8K0-959-793.clb
   Part No SW: 8K0 959 793 S    HW: 8K0 959 793 Q
   Component: TSG FA        H02 0511  
   Revision:             Serial number: 0000156102671 
   Coding: 011003204000440004
   Shop #: WSC 06335 000 00000
   VCID: 50AF7B1C03E06206C3-8004

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist (J500)       Labels:| 8K0-909-144.clb
   Part No SW: 8R0 909 144 P    HW: 8R0 909 144 B
   Component: RCEPS         H43 0510  
   Revision: 00001000    Serial number: 0003897240
   Coding: 100000010001
   Shop #: WSC 06334 123 12345
   ASAM Dataset: EV_RCEPSAU48X 008018
   ROD: EV_RCEPSAU48X_008.rod
   VCID: 45815A48C4A2B7AE60-8010

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. (J393)       Labels:. 8K0-907-064-46.clb
   Part No SW: 8K0 907 064 KG    HW: 8K0 907 064 KG
   Component: BCM2 2.0      H15 0711  
   Revision: 00002001    Serial number: 0372849102    
   Coding: 0100063820B930008720053680040047
   Shop #: WSC 06335 000 00000
   VCID: 7F0D08A0EEFE2D7E6A-802A

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels:. 8K0-959-792.clb
   Part No SW: 8K0 959 792 S    HW: 8K0 959 792 Q
   Component: TSG BF        H02 0511  
   Revision:             Serial number: 0000156115126 
   Coding: 011003204000440004
   Shop #: WSC 06335 000 00000
   VCID: 4FAD78601EDE7DFEDA-801A

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake (----)       Labels: 8K0-907-801-V2.clb
   Part No SW: 8K0 907 801 N    HW: 8K0 907 801 J
   Component: EPB-4         H02 0005  
   Revision: --------    Serial number: 20000000646947
   ASAM Dataset: EV_ParkiBrake 001028
   ROD: EV_ParkiBrake_AU48.rod
   VCID: 3A7B39B4BD5CC8561D-806E

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio (J503)       Labels:. 8Tx-035-1xx-56.clb
   Part No SW: 8R1 035 186 N    HW: 8R1 035 186 N
   Component: Concert3      H09 0470  
   Revision: 00000004    Serial number: AUZ5Z6P2165924
   Coding: 0500048204058500455B071003
   Shop #: WSC 06335 000 00000
   VCID: 408F4B5CD380928653-8014

   Subsystem 1 - Part No SW: 8T0 919 603 G    HW: 8T0 919 603 G
   Component: Display  

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels:. 8K0-959-795.clb
   Part No SW: 8K0 959 795 G    HW: 8K0 959 795 D
   Component: TSG HL        H01 0510  
   Revision:             Serial number: 0000156542019 
   Coding: 010003204000240004
   Shop #: WSC 06335 000 00000
   VCID: 46835D44F1A4BCB669-8012

No fault code found.

-------------------------------------------------------------------------------
Address 69: Trailer (J345)       Labels:. 8K0-907-383.clb
   Part No SW: 8K0 907 383 D    HW: 8K0 907 383 D
   Component: Anhaenger     H12 0100  
   Revision: 1G001001    Serial number: 00000372992472
   Coding: 0109080000000000
   Shop #: WSC 25397 000 00000
   VCID: 35612A889C42272EF0-8060

No fault code found.

-------------------------------------------------------------------------------
Address 6D: Trunk Elect. (J605)       Labels: 4L0-910-945.clb
   Part No SW: 8R0 827 851 D    HW: 8R0 827 851 D
   Component: J605  Master  H56 0330  
   Revision: --------    Serial number: 8R0827851D    
   VCID: 3D7132A8A472FF6E38-8068

   Subsystem 1 - Part No SW: 8R0 827 852 D    HW: 8R0 827 852 D
   Component: J756  Slave  H56 0330 
   Serial number: 8R0827852D          

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels:. 8K0-959-795.clb
   Part No SW: 8K0 959 795 G    HW: 8K0 959 795 D
   Component: TSG HR        H01 0510  
   Revision:             Serial number: 0000156542211 
   Coding: 010003204000240004
   Shop #: WSC 06335 000 00000
   VCID: 46835D44F1A4BCB669-8012

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 8P0-862-335.lbl
   Part No SW: 8T0 862 335 F    HW: 8T0 862 335 E
   Component: FSE_256x BT     H45 0660  
   Revision: 00000000    Serial number: 00000005843423
   Coding: 0010390
   Shop #: WSC 06335 000 00000
   VCID: 3D7132A86472FF6E38-8068

No fault code found.

-------------------------------------------------------------------------------
Address AC: Reductant Control (J880)       Labels: 4G0-907-355.clb
   Part No SW: 4G0 907 355 G    HW: 4G0 907 355 B
   Component: SCR-Stg-G2    H10 0013  
   Revision: 00000000    Serial number: 151680802
   ASAM Dataset: EV_RDCMA00100 008040
   ROD: EV_RDCMA00100.rod
   VCID: 2F6D18E0761E1DFEBA-807A

No fault code found.

End-------------------------(Elapsed Time: 03:41)--------------------------
 
   #2  

bonzo

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the simple way it to reflash ecu and made addblue off.i have same problem as you
 
   #3  

fast79

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That's one option, I'm not going to spend too much money fixing that issue.
 
   #4  

fast79

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Anyone? I know these issues are quite common but it's hard to find which has been the original fault in these problems.
 
   #5  

naushad2982

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Overfilling can cause a failed reset. drain some of it off and try again
 
   #6  

fast79

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It wasn't overfilled until third time I filled it past year so that's not the case. Now the period to get the refill message seems to be shorter every time after last reset.
 
   #7  

Jef

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Have you done the two Basic Setting steps back to back with key on/engine off?

  1. IDE04567 - Resetting of SCR tank level detection
  2. IDE04730 - Reset SCR lock
 
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   #8  

fast79

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Yes I have, every time I get the "refill Adblue" message. Now the refill message is on again so it appears in two-three weeks period now.
 
   #9  

Uwe

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Maybe have a look at the following measuring values:
IDE03147 -- Sensor for reducing agent tank temperature: voltage (mV)
IDE03148 -- Sensor for reducing agent fill level: voltage (mV)
IDE03142 -- Remaining vehicle distance until reducing agent deficiency (km)
IDE05232 -- Reducing agent fill level (%)
IDE05630 -- Reducing agent tank fill level indicator: raw value (%)


I wonder if the level sensor isn't seeing that you have filled the tank. The problem is if the tank is full, you'll have partly drain the tank in order to see if things change.

I've never understood why VAG wants to keep the amount of DEF in the tank a secret from the owner. Other manufacturers give you a dedicated gauge for it!



-Uwe-
 
   #10  

fast79

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I've checked those values you mentioned earlier and one thing I have noticed that IDE05630 -- Reducing agent tank fill level indicator: raw value (%) is 16,70% . That value doesn't change even if I reset IDE05232 -- Reducing agent fill level (%) . I think the case is just like you said, the sensor doesn't recognize filled tank level. I've been wondering if there's anything I could do to the sensor, that's unlikely an interchangeable part? I wouldn't want to change the whole tank because a faulty sensor.
By the way the refill message is again on. Is it possible to change the fill level indicator raw value?
 
   #11  

Uwe

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I have noticed that IDE05630 -- Reducing agent tank fill level indicator: raw value (%) is 16,70% .
The VWs we've with DEF systems we've had (an NMS Passat and Touareg) also had fill-level values that basically never changed (despite never showing any indication of a malfunction). I'm really not sure what's up with that. However, they tended to be right around 80%..

I've been wondering if there's anything I could do to the sensor, that's unlikely an interchangeable part? I wouldn't want to change the whole tank because a faulty sensor.
I think you're going to need to check a repair manual and/or parts catalog for your specific vehicle.

-Uwe-
 
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fast79

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Last night check engine light went on and I found a following dtc:

Code:
                Address 01: Engine       Labels: 04L-907-309-V1.clb
Control Module Part Number: 04L 906 021 CK    HW: 04L 907 309 
  Component and/or Version: R4 2,0L EDC   H23 8507
           Software Coding: 2A25401A243601080000
            Work Shop Code: WSC 06208 000 00000
              ASAM Dataset: EV_ECM20TDI01104L906021CK 002009 (AU48)
                       ROD: EV_ECM20TDI01104L906021CK_002.rod
                      VCID: 70EFDB9CABA04204F3-8024
1 Fault Found:

9645 - Reductant 
          P20E8 00 [237] - Pressure too Low
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 187754 km
                    Date: 2020.12.16
                    Time: 09:53:25

                    Engine RPM: 977.50 /min
                    Normed load value: 45.9 %
                    Vehicle speed: 10 km/h
                    Coolant temperature: 52 °C
                    Intake air temperature: 38 °C
                    Ambient air pressure: 1000 mbar
                    Voltage terminal 30: 14.460 V
                    Unlearning counter according OBD: 40
                    Outside temperature sensor 1: B1: raw value: 0.5 °C
                    Pressure sensor for reducing agent: measured pressure: 236 hPa
                    Sensor for reducing agent tank temperature: temperature: 2.3 °C
                    Reducing agent pump: activation: 50.00 %
                    Sensor for reducing agent fill level: voltage: 520.0 mV


Readiness: 1 1 0 0 0
I guess we found a problem which explains all these issues. This is a 2015 car and there's been lots of faulty pump units on this model year what I have read.
 
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   #13  

fast79

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Today came AdBlue system fault message, no restart in 1000km. I cleared fault codes in engine control module and made reset to scr tank level and scr lock. There are no fault codes in any control modules but there's still AdBlue fault message on FIS display. Is there really 1000km or less left to do something about it or can I reset that fault message somehow?
 
   #14  

Uwe

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Check for DTCs via generic OBD-II as well. Use modes 3, 7, and especially 10.

-Uwe-
 
   #15  

fast79

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Ok, thanks for the tip. I'm going to a local software specialist next tuesday and we will say goodbye to the whole AdBlue system...
 
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