When your 2022 Jeep Grand Cherokee displays the P0304 code, the engine control module has detected recurring misfires in cylinder 4. As the first year of the fifth-generation WL platform, understanding the new design's engine options enables targeted diagnosis for this premium SUV's combustion problem.
Understanding P0304 in the 2022 Grand Cherokee
The redesigned 2022 Grand Cherokee offers several engine choices: the 3.6L Pentastar V6 as standard, the 5.7L V8 with Multi-Displacement System, and the 2.0L turbocharged four-cylinder in the 4xe plug-in hybrid. Cylinder 4 location varies significantly by engine—V6 and V8 place it on the rear/right bank, while the four-cylinder positions it at the rear of the inline arrangement.
New Platform Considerations
First-year redesigned vehicles may reveal issues as miles accumulate. The new platform includes updated engine bay layout affecting component access. Monitor for technical service bulletins addressing 2022-specific concerns. Standard ignition and fuel system wear remains the most common P0304 source regardless of platform generation.
Diagnostic Approach
Identify your engine configuration precisely. Retrieve all codes including hybrid system faults for 4xe. For V8 models, check for Multi-Displacement System codes. Locate cylinder 4 appropriate to your engine. Test ignition coil output and spark plug condition. Verify fuel injector operation.
Repair Solutions
Install Jeep-specified spark plugs for your engine type. Replace degraded ignition coils. For V8 with MDS, inspect the deactivation system if related codes exist. Hybrid models may require dealer expertise for complex integration issues.