vagcom diagnostics

[poosemon]

Hi,

If a dealer plugs your car into their diagnostics does it bring up a history of faults or just most recent/current/pending one? I.e can you see what might of occurred in the past?

 

[Orionaut]

There is no current way I am aware of of recovering faults that have been deleted/cleared (IE a lifetime fault history)

(Though I wouldn't be surprised if a "Lifetime fault history" function may become an available in the future)

What is your problem?

 

[Iceman]

Faults normally clear after a certain amount of time or drive cycles, providing the fault is no longer there. I know through diagbox on Peugeot you can go through fault journal and that brings up a list of everything that has occurred.

 

[pepsilol]

Yes they are called shadow fault codes.

 

[Iceman]

Yes they are called shadow fault codes.

On a BMW yes they are.

 

[snapdragon69]

With vagcom (VAG cars), faults have a reset counter which goes down by 1 on each problem-free driving cycle until 0 it then clears/disappears (unless manually cleared before 0 is reached)
Once cleared, there is no ordinary way to recover it apart from the logs on the diagnostic tool if they were saved.
e.g. this counter was 200, now 186...

Address 19: CAN Gateway Labels: 4E0-910-468.lbl
Part No SW: 4E0 910 468 B HW: 4E0 907 468 E
Component: Gateway H11 0090
Revision: 11 Serial number: 2000305C028102
Coding: FCFE7FDE3B7D04
Shop #: WSC 02313 785 00200
VCID: 2756723996BB822040F

1 Fault Found:
00467 - TV Tuner (R78)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 3
Fault Frequency: 2
Reset counter: 186
Mileage: 309278 km
Time Indication: 0
Date: 2012.11.26
Time: 18:41:50