When your 2022 Acura RDX triggers the P0303 code, the engine control module has identified consistent misfires in cylinder 3. The RDX features a 2.0L turbocharged four-cylinder engine requiring specific diagnostic approaches.
2.0L Turbo Engine Layout
The 2022 RDX uses the K20C6 2.0L turbocharged direct-injection four-cylinder producing 272 horsepower. Cylinder 3 is the third from the front on this inline-4. The turbocharger and direct injection add diagnostic complexity.
Common Causes
- Ignition Coil Failure: Turbo boost increases ignition system demands
- Spark Plug Issues: Turbocharged applications require specific plugs
- Boost System Leaks: Intake and boost pipe leaks cause lean misfires
- Fuel Injector Problems: Direct injection deposits or failures
- Carbon Buildup: GDI technology leads to intake valve deposits
Diagnostic Approach
Use an Acura/Honda compatible scanner for turbo-specific diagnostics. Monitor boost pressure, fuel trim, and misfire data. Check for vacuum and boost leaks. Test ignition components systematically.
Repair Solutions
Replace failed ignition coils with Denso/NGK OEM components. Install Acura-specified spark plugs for turbo applications. Repair boost system leaks. Address carbon buildup through professional intake cleaning.