The P0303 diagnostic trouble code on your 2022 Audi Q5 indicates the engine control module has detected consistent misfires in cylinder 3. The premium SUV uses Audi's proven 2.0L TFSI turbocharged engine.
2.0L TFSI Engine Configuration
The 2022 Q5 uses the EA888 2.0L turbocharged four-cylinder with combined direct and port injection. Cylinder 3 is the third from the front on this inline-4. The SQ5 uses a different V6 turbo engine.
Common Causes
- Ignition Coil Failure: Turbo applications stress coil packs
- Spark Plug Issues: TFSI engines require specific spark plugs
- Boost System Leaks: Diverter valve and charge pipe failures
- Fuel Injector Problems: Both port and direct injectors can fail
- PCV System Issues: Crankcase ventilation system failures
Diagnostic Approach
Use VCDS or OBDeleven for detailed Q5 diagnostics. Monitor misfire counts, boost pressure, and fuel trim data. Test ignition components through swap testing. Check for known issues like PCV failures.
Repair Solutions
Replace failed ignition coils with OEM or quality aftermarket parts. Install Audi-specified spark plugs. Repair boost system leaks. Replace PCV valve assembly if diagnosed as the cause.