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Discussion Starter #1
I recently bought an Audi A5 1.8 TFSI and after driving it daily for a month or so the EPC light came on as well as I got this message in the dashboard: start-stop system: system fault function unavailable.
I checked the car for fault codes, I got:
P256300 Passive/Abiogenesis. Turbocharger boost control position circuit range/performance

I explained this to a mechanic, but he told me that he can't see the Connection between the 3 errors.

I tried buying a new battery, but it didn’t help.
I was wondering if anyone had a similar problem and if you know if these 3 errors are somehow caused by each other.
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