Audi A4 B6 Common Problems [top] -

| Engine | Code | Known Issues | |--------|------|---------------| | 1.8T 20V | AMB | Sludge, coils, turbo oil feed line clogs, PCV system cracks | | 3.0L V6 | AVK | Timing chain tensioners (engine out), valve cover gaskets | | 2.0L (non-US) | ALT | Cam follower failure, coil packs | | 1.9 TDI (PD) | AWX/AVF | Injector wiring harness, tandem pump leaks |