Audi A5 / S5 / RS 5 Coupe & Cabrio - U044700 Invalid Data Received From Gateway "A" - after a diagnosis of my Audi A5 1.8TFSI, I found some anomalies, in particular this error code: U044700
U044700 Invalid Data Received From Gateway A - AudiWorld Forums
Learn about common causes of the U0100 code, and how to diagnose them. If it's time to replace your PCM we're here to help.
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U0100 – Data bus: engine control module (ECM) A – no communication