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  1. Audi A5/S5 Tech DIY
    Hi, 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...