The 2020 Dodge Challenger carries on the muscle car legacy with a range of powerful engine options. When your Challenger displays a P0304 code indicating a cylinder 4 misfire, engine-specific diagnosis ensures you get back to enjoying the driving experience quickly.
Understanding P0304 in the Challenger
Cylinder 4 location depends on your engine. In the 3.6L Pentastar V6 (SXT), cylinder 4 is on the rear of the left bank. In HEMI V8 engines, cylinder 4 is on the right (passenger) bank. All engines feature individual coil-on-plug ignition for accurate misfire detection.
HEMI MDS Considerations
The 5.7L HEMI (R/T) includes Multi-Displacement System that deactivates cylinders for fuel economy. MDS lifter issues are a documented concern that can cause misfires during cylinder deactivation transitions. The 6.4L HEMI (Scat Pack/SRT) doesn't have MDS.
Diagnostic Approach
Identify your engine and access cylinder 4 accordingly. Inspect spark plug and ignition coil condition. On 5.7L models, note whether misfires occur during highway cruising when MDS is active. Check for intake vacuum leaks.
Repair Process
Replace spark plugs with Mopar specifications. Test ignition coil output. On 5.7L HEMI with MDS concerns, lifter inspection may be necessary. Ensure correct oil specification for MDS operation.