The P0303 diagnostic trouble code on your 2024 Dodge Durango indicates the engine control module has detected consistent misfires in cylinder 3. The 2024 Durango continues with proven V6 and V8 powertrains.
2024 Durango Powertrains
The 2024 Durango offers the 3.6L Pentastar V6, 5.7L HEMI V8, or 6.4L HEMI V8. On all engines, cylinder 3 is on the driver's side. The 5.7L HEMI features MDS cylinder deactivation, while the 6.4L does not.
Common Causes
- Ignition Coil Failure: Individual coil packs can fail
- Spark Plug Problems: HEMI plugs require specific service procedures
- MDS System Issues: 5.7L HEMI lifter and solenoid failures
- Fuel Injector Concerns: Deposits or electrical problems
- Intake Manifold Leaks: Vacuum leaks affecting mixture
Diagnostic Methodology
Identify your engine type and use a diagnostic scanner to access specific data. Monitor MDS operation on 5.7L models. Test ignition components systematically. Check for Stellantis TSBs addressing known issues.
Repair Solutions
Replace faulty ignition coils with Mopar components. Follow proper HEMI spark plug removal procedures. For MDS-related failures, lifter replacement is typically required. Repair fuel and intake system issues as diagnosed.