Hi,
Both codes are related to the same bank on the engine. It could be a misalignment issue with the timing chain. I would think if it was electrical, it would likely be on both sides of the engine. I say that with the idea that the donor was a different year.
Audi's are very sensitive to variations in timing. By any chance, did you inspect the timing chains/timing before the installation? Also, is this the same vehicle having transmission issues? If so, is the transmission from a different model year as well?
Let me know.
Joe
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Thursday, December 21st, 2023 AT 10:49 PM