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Engine Warning Light / OBD

Posted: Sun Oct 17, 2021 11:35 am
by monkeychap
Hi All

I've got an engine warning light on. Wasn't sure if the car was OK to drive to the Audi dealer (it's still full dealer service history...) so I bought one of these:

https://smile.amazon.co.uk/dp/B081635ZLF

It's not picking up any codes. Is there something unusual about B7s that I need a different fault code analyser ?

Thanks

Ian

Re: Engine Warning Light / OBD

Posted: Tue Oct 26, 2021 8:56 pm
by DocMcc
RS4 has 2 ECUs so maybe the error is on the second one - use VCDS to check - I found errors on the second ECU that were not on the main one when scanned.