A P0303 diagnostic code on your 2022 Dodge Challenger indicates the powertrain control module has detected consistent misfires in cylinder 3. The iconic muscle car offers several powertrain options requiring different diagnostic approaches.
2022 Challenger Powertrains
The 2022 Challenger offers the 3.6L Pentastar V6, 5.7L HEMI V8 with MDS, 6.4L HEMI V8, and supercharged Hellcat/Redeye variants. Cylinder 3 on HEMI V8s is on the driver's side bank. Understanding your specific engine is essential for proper diagnosis.
Typical Causes
- Ignition Coil Degradation: High-performance demands stress coil packs
- Spark Plug Wear: HEMI plugs eventually reach end of life
- MDS System Issues: 5.7L HEMI lifter and solenoid failures
- Fuel Injector Problems: Deposits or electrical failures
- Mechanical Wear: Valve train components degrading
Diagnostic Process
Connect a diagnostic scanner to access engine-specific data. On 5.7L models, correlate misfires with MDS activation. Test ignition components systematically. Check fuel delivery and compression if ignition causes are ruled out.
Repair Recommendations
Replace failed ignition coils with Mopar components rated for your application. Follow proper HEMI spark plug service procedures. For MDS-related failures on 5.7L engines, lifter replacement is typically required.