When your 2022 Audi A4 triggers the P0303 code, the engine control module has identified consistent misfires in cylinder 3. The A4's 2.0L TFSI turbocharged engine requires specific diagnostic approaches.
2.0L TFSI Engine Layout
The 2022 A4 uses the EA888 Gen3B 2.0L turbocharged four-cylinder with combined direct and port injection. Cylinder 3 is the third from the front on this inline-4 configuration. The dual injection system helps reduce carbon buildup.
Common Causes
- Ignition Coil Failure: Audi's high-output turbos stress coil packs
- Spark Plug Issues: TFSI engines require specific NGK or Bosch plugs
- Boost System Leaks: Diverter valve and intake leaks common
- Fuel Injector Problems: Both direct and port injectors can fail
- PCV System Issues: Positive crankcase ventilation failures
Diagnostic Approach
Use VCDS (VAG-COM) or OBDeleven for detailed Audi diagnostics. Monitor misfire counts, boost pressure, and fuel trim. Check known failure points like ignition coils and PCV valves. Test components systematically.
Repair Solutions
Replace failed ignition coils with OEM or quality aftermarket parts. Install Audi-specified spark plugs. Repair boost leaks including diverter valve issues. Replace PCV valve if diagnosed as the cause.