The 2022 Acura RDX delivers luxury compact SUV performance with its responsive 2.0L turbocharged engine. When your RDX displays a P0304 code indicating a cylinder 4 misfire, understanding this turbocharged powertrain helps guide accurate diagnosis.
Understanding P0304 in the RDX
The RDX's 2.0L turbocharged four-cylinder is Honda's K-series turbo engine known for performance and refinement. Cylinder 4 is located at the rear of the inline-4 engine, nearest the firewall. The engine control module monitors combustion events with precision.
Turbo Engine Considerations
The turbocharged environment creates higher combustion pressures than naturally aspirated engines. This accelerates spark plug wear and demands ignition components in excellent condition. Direct injection technology can contribute to carbon buildup on intake valves over time.
Diagnostic Approach
Access the cylinder 4 ignition coil at the engine's rear. Inspect spark plug electrode condition. Check for boost leaks in the charge piping and intercooler connections. Verify no vacuum leaks exist in the intake system.
Resolution Process
Replace spark plugs with Acura specifications designed for turbo operation. Test ignition coil output. If carbon buildup is suspected on higher-mileage vehicles, intake valve cleaning may be warranted.