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Root Cause of Software Problems Known?

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1.6K views 18 replies 6 participants last post by  Atlant  
Do we know the OBD codes or anything about how the issues are tracked? I’m still having some issues after the updates and having a really hard time advocating for myself with my dealership.
Most issues you have to show the problem to the dealer service advisor. If you describe what problems you are seeing you might get some help here about how to show the dealer. If they saw the issue and won't do anything, calling VW customer care often helps.
 
Recently it is the screen going blank
This can be caused by a weak 12v battery. Mine has gone bad at 2 years old twice now and causes a variety of strange things including a blank screen, without giving any 12v low messages even as it drops to 11.5v. The trick is to test it under load while disconnected from the car.
the tire pressure sensors appear to be overactive
Have you reset the TPMS under Vehicle-Tires? You need to do this anytime you change the pressure more than a few psi.
BTW does anyone else have incredibly squeaky brakes?
Mine have always been completely quiet, so they must have changed something about them. Or my semi-desert dry climate avoids the problem.
 
Also- why should their log systems be proprietary?
They are not proprietary, they log everything, including many DTC that are meaningless. You can look at them all with car scanner and a $30 dongle. The dealer is lying to you, and simply does not want the work of digging through hundreds of DTC to find any that might be relevant. Most dealers will only take action on a DTC warning light that is active or a problem they can repeat, not one that exists only in the logs.
 
Here is a recent DTC log from my car scanner when everything was working fine. Note it shows some at Odometer: 1048574 km so it clearly is buggy since I was at only around 53000 km. Predicting errors in the future?

Code:
DTC report
Connection profile: Volkswagen EV MEB: ID.3, ID.4, ID.5, ID.6, ID.7, ID.Buzz, Enyaq, Elroq, Q4 E-tron, Q6 e-tron, Cupra Born, Cupra Tavascan, Porsche Macan EV, etc.; Ford Explorer EV, Capri EVDate: 7/16/2025 2:28:33 PM
============================
OBD-IIOBD-II
DTCs: 1
----------------------------
524112 [0x07FF50] Archive (inactive)
Status: Test failed since last DTC clear, Test not completed during this operation cycle
============================
19. CAN Gateway19. CAN Gateway
DTCs: 20
----------------------------
1049259 [0x1002AB]
Status bits: 1
Priority: 4
Frequency: 1
Unlearning index: 4
Odometer: 50369 km
Date, time: 2025.05.18 14:27:47
Status: Pending, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
2502759 [0x263067] Archive (inactive)
Status bits: 1
Priority: 4
Frequency: 1
Unlearning index: 4
Odometer: 50369 km
Date, time: 2025.05.18 14:27:40
Status: Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
8397569 [0x802301]
Status bits: 1
Priority: 5
Frequency: 7
Unlearning index: 36
Odometer: 1048574 km
Date, time: 2025.05.30 14:28:35
Status: Pending, Confirmed, Test failed since last DTC clear
----------------------------
8471814 [0x814506]
Status bits: 1
Priority: 6
Frequency: 255
Unlearning index: 40
Odometer: 47776 km
Date, time: 2025.03.09 21:59:33
Status: Test failed (current drive cycle), Pending, Confirmed, Test failed since last DTC clear
----------------------------
8540417 [0x825101]
Status bits: 1
Priority: 6
Frequency: 1
Unlearning index: 4
Odometer: 50368 km
Date, time: 2025.05.18 14:27:21
Status: Pending, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
7467521 [0x71F201]
Status bits: 1
Priority: 4
Frequency: 1
Unlearning index: 40
Odometer: 47776 km
Date, time: 2025.03.09 21:40:11
Status: Test failed, Test failed (current drive cycle), Pending, Confirmed, Test failed since last DTC clear
----------------------------
7467522 [0x71F202]
Status bits: 1
Priority: 4
Frequency: 1
Unlearning index: 40
Odometer: 47776 km
Date, time: 2025.03.09 21:40:11
Status: Test failed, Test failed (current drive cycle), Pending, Confirmed, Test failed since last DTC clear
----------------------------
8491266 [0x819102]
Status bits: 1
Priority: 1
Frequency: 255
Unlearning index: 40
Odometer: 47781 km
Date, time: 2025.03.10 19:30:29
Status: Pending, Confirmed, Test failed since last DTC clear
----------------------------
219136 [0x035800]
Status bits: 1
Priority: 5
Frequency: 11
Unlearning index: 255
Odometer: 47781 km
Date, time: 2025.03.11 15:02:20
Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
219139 [0x035803]
Status bits: 1
Priority: 5
Frequency: 30
Unlearning index: 255
Odometer: 48838 km
Date, time: 2025.04.12 14:02:45
Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
9371914 [0x8F010A]
Status bits: 1
Priority: 6
Frequency: 255
Unlearning index: 40
Odometer: 47776 km
Date, time: 2025.03.09 21:42:58
Status: Test failed (current drive cycle), Pending, Confirmed, Test failed since last DTC clear
----------------------------
8515600 [0x81F010]
Status bits: 1
Priority: 3
Frequency: 1
Unlearning index: 36
Odometer: 52444 km
Date, time: 2025.07.11 20:16:02
Status: Pending, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
12400 [0x003070]
Status: Pending, Test failed since last DTC clear
----------------------------
2244723 [0x224073] Archive (inactive)
Status bits: 1
Priority: 4
Frequency: 4
Unlearning index: 36
Odometer: 49415 km
Date, time: 2025.04.28 11:41:17
Status: Confirmed, Test failed since last DTC clear
----------------------------
2240769 [0x223101]
Status bits: 1
Priority: 4
Frequency: 2
Unlearning index: 40
Odometer: 47776 km
Date, time: 2025.03.09 21:40:14
Status: Test failed, Test failed (current drive cycle), Pending, Confirmed, Test failed since last DTC clear
----------------------------
8516881 [0x81F511]
Status bits: 1
Priority: 6
Frequency: 2
Unlearning index: 36
Odometer: 51741 km
Date, time: 2025.06.20 00:53:15
Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
8516896 [0x81F520]
Status: Pending, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
8516869 [0x81F505]
Status bits: 1
Priority: 6
Frequency: 84
Unlearning index: 40
Odometer: 48404 km
Date, time: 2025.03.26 17:29:52
Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
8516866 [0x81F502]
Status bits: 1
Priority: 6
Frequency: 1
Unlearning index: 36
Odometer: 52444 km
Date, time: 2025.07.11 20:16:02
Status: Pending, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
8398626 [0x802722]
Status bits: 1
Priority: 4
Frequency: 1
Unlearning index: 11
Odometer: 50890 km
Date, time: 2025.05.31 16:22:47
Status: Pending, Test failed since last DTC clear, Test not completed during this operation cycle
============================
09. Onboard supply control unit09. Onboard supply control unit
DTCs: 1
----------------------------
15401472 [0xEB0200]
Status bits: 1
Priority: 3
Frequency: 6
Unlearning index: 26
Odometer: 48568 km
Date, time: 2025.03.29 16:10:47
Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle
============================
03. ABS control unit
No DTC found.
============================
04. Power steering
No DTC found.
============================
05. Authorization system for access and starting the engine
No DTC found.
============================
06. Front passenger seat
No DTC found.
============================
08. Heater and climate08. Heater and climate
DTCs: 1
----------------------------
524112 [0x07FF50] Archive (inactive)
Status: Test failed since last DTC clear, Test not completed during this operation cycle
============================
15. SRS
No DTC found.
============================
16. Steering column
No DTC found.
============================
23. Increased braking force
No DTC found.
============================
2B. Steering column lock (UDS)
No DTC found.
============================
36. Driver seat adjustment
No DTC found.
============================
42. Driver door electronic equipment
No DTC found.
============================
44. Power steering
No DTC found.
============================
52. Front passenger door electronics
No DTC found.
============================
5F. Electronic Information System 15F. Electronic Information System 1
DTCs: 1
----------------------------
04112 [0x001010] Archive (inactive)
Status: Test failed since last DTC clear
============================
69. Trailer functions
No DTC found.
============================
6D. Tailgate/Boot lid
No DTC found.
============================
75. Emergency Call and Communication Module75. Emergency Call and Communication Module
DTCs: 1
----------------------------
1375744 [0x14FE00]
Status bits: 1
Priority: 1
Frequency: 255
Unlearning index: 40
Odometer: 1048574 km
Date, time: 2025.06.27 13:33:14
Status: Pending, Confirmed, Test failed since last DTC clear
============================
BB. Rear door behind driver (UDS)
No DTC found.
============================
BC. Rear door behind passenger (UDS)
No DTC found.
============================
C0. Actuator for exterior noise (UDS)
No DTC found.
============================
C6. High-voltage battery charger (UDS)C6. High-voltage battery charger (UDS)
DTCs: 3
----------------------------
1055489 [0x101B01] Archive (inactive)
Status: Test failed since last DTC clear
----------------------------
3280899 [0x321003]
Status bits: 1
Priority: 6
Frequency: 1
Unlearning index: 40
Odometer: 48055 km
Date, time: 2025.03.15 12:50:46
Status: Test failed, Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
14750981 [0xE11505] Archive (inactive)
Status: Test failed since last DTC clear, Test not completed during this operation cycle
============================
01. Engine (EVO/29bit)01. Engine (EVO/29bit)
DTCs: 1
----------------------------
17182 [0x00431E] Archive (inactive)
P0798 Pressure regulator 3: malfunction in an electric chain; Pressure control valve 3 electrical fault in the circuit
Status: Test failed since last DTC clear, Test not completed during this operation cycle
============================
0051. Electro-engine (29 bit)
No DTC found.
============================
008C. Battery management system (29 bit)
No DTC found.
============================
CA. Sunroof control module (29 bit)
No DTC found.
============================
CE. Electric drive 2 (29 bit)
No DTC found.
============================
D6. Headlight control left 2 (29 bit)
No DTC found.
============================
D7. Headlight control right 2 (29 bit)
No DTC found.
============================
8105. DC Charger (29 bit)
No DTC found.
 
Does this square with what you were expecting/interpreting from the scan?
Yes. I especially agree about 12v stability being a major problem causing many/most errors that we see. I have a Bluetooth monitor on my 12v battery recording voltage at all times and have documented in threads here the large number of problems it causes as it drops to 11.5v before it wakes up and recharges it. Mostly when cold <10F. It gets abused by these drops and if yours is >2 years old I would suspect it causing your screen blanking problems as I mentioned way back in post #6 here. Warning: dealers are no good at testing the 12v properly. Edit: and the car will have these strange problems without ever putting up a 12v low warning.