The P0303 diagnostic trouble code on your 2023 Dodge Charger indicates the powertrain control module has detected consistent misfires in cylinder 3. As one of the final model years of the current Charger generation, the 2023 offers proven powertrains.
2023 Charger Powertrains
The 2023 Charger offers the 3.6L Pentastar V6, 5.7L HEMI V8, 6.4L HEMI V8, and supercharged variants. On V8 engines, cylinder 3 is on the driver's side. The 5.7L HEMI includes MDS cylinder deactivation affecting certain cylinders including cylinder 3.
Common Causes
- Ignition Coil Failure: High-output engines demand reliable ignition
- Spark Plug Issues: HEMI two-piece plugs require periodic attention
- MDS Component Failure: 5.7L lifters and solenoids can fail
- Fuel Injector Problems: Deposits or electrical failures
- Intake System Leaks: Manifold or gasket failures
Diagnostic Methodology
Use a diagnostic scanner to access engine-specific data. For 5.7L models, monitor MDS operation and misfire correlation. Test ignition components systematically. Review applicable Stellantis TSBs.
Repair Solutions
Replace failed ignition coils with Mopar components. Use proper techniques for HEMI spark plug service. Address MDS lifter issues following manufacturer procedures. Repair fuel delivery and intake system problems as diagnosed.