SOLD-- 2012 Q5 2.0t - Stock Mommy Missile with new timing chains Former USP CLUB MEMBER #136 2004 A4 1.8TQ 6MT USP - APR Stage 1+ - FSI Coils - BKR7EIX-11 - B6S4 Front + B7A4 Rear Brakes - 034 Street Trans Mount SOLD -- 2006 A4 2.0TQ Avant Tiptronic
Hereare some of the most common things that happen when your A4’s ECM is bad. 1. Failed Self Diagnostic Cycle. When you start your A4, the ECM will do a self diagnostic cycle. If it fails the cycle, you’ll get a check engine light. This trouble code will tell you what part of the diagnostic that it failed, and you’ll have a pretty good