When your 2022 Jeep Grand Wagoneer displays the P0304 code, the engine control module has detected recurring misfires in cylinder 4. As the first year for this luxury full-size SUV, understanding the powerful V8 engine and premium vehicle expectations enables targeted diagnosis.
Understanding P0304 in the 2022 Grand Wagoneer
The 2022 Grand Wagoneer features the 6.4L V8 producing 471 horsepower as standard. This naturally aspirated V8 positions cylinder 4 on the right (passenger) bank toward the rear. The premium SUV demands smooth, refined operation making prompt misfire resolution particularly important.
First-Year Production Considerations
As the first model year of a new vehicle line, monitor for technical service bulletins addressing any widespread concerns. First-year production can reveal unexpected issues as miles accumulate. Standard ignition wear—spark plug and coil degradation—remains the most common P0304 cause regardless of vehicle newness.
Diagnostic Approach
Retrieve all codes and analyze freeze frame data. Check for technical service bulletins specific to 2022 Grand Wagoneer. Locate cylinder 4 on the right bank of the V8. The full-size SUV's generous engine bay provides reasonable access. Test ignition coil output and spark plug condition.
Repair Solutions
Install Jeep-specified spark plugs for the 6.4L V8. New vehicle warranty should cover first-year manufacturing defects. Replace degraded ignition coils. The Grand Wagoneer's premium character demands quality components for smooth operation.