When your 2022 Jeep Compass displays the P0304 code, the engine control module has detected recurring misfires in cylinder 4. The compact SUV's updated powertrain requires understanding of the turbocharged four-cylinder engine for effective diagnosis.
Understanding P0304 in the 2022 Compass
The 2022 Compass features the 2.4L Tigershark four-cylinder in base models or the 2.0L turbocharged engine in higher trims. Both inline-four configurations position cylinder 4 at the rearmost location near the firewall. Understanding which engine your Compass has helps target diagnosis appropriately.
Engine-Specific Considerations
The 2.4L naturally aspirated engine faces standard ignition wear. The 2.0L turbo experiences higher demands from boosted pressures, requiring spark plugs rated for turbocharged applications. Both engines use direct injection with associated carbon accumulation potential on intake valves.
Diagnostic Approach
Identify your engine type—2.4L or 2.0T. Retrieve all codes and analyze freeze frame data. For turbo models, check for boost-related codes. Access cylinder 4 at the rear of the engine. Test ignition coil output and spark plug condition. Verify fuel injector operation.
Repair Solutions
Install Jeep-specified spark plugs appropriate for your engine—turbo applications require specific components. Replace degraded ignition coils. Address fuel system concerns. Carbon cleaning benefits higher-mileage direct injection vehicles.