The P0302 diagnostic code on your 2020 Dodge Durango indicates that the engine control module has detected cylinder 2 misfires exceeding acceptable thresholds. This full-size SUV offers multiple engine options requiring specific diagnostic strategies.
2020 Durango Engine Options
The 2020 Dodge Durango came with three engine choices: the 3.6L Pentastar V6, 5.7L HEMI V8, and the performance-oriented 6.4L HEMI V8 in the SRT model. Each engine has unique characteristics affecting misfire diagnosis.
Pentastar V6 Analysis
The 3.6L V6 uses direct fuel injection, which can contribute to intake valve carbon buildup over time. Additionally, ignition coil failures have been documented on this engine. Cylinder 2 is located on the front bank for easier access.
HEMI MDS Considerations
The 5.7L and 6.4L HEMI V8 engines feature Multi-Displacement System cylinder deactivation. Cylinder 2 can be deactivated during light-load driving. MDS lifter issues have been documented and can cause cylinder-specific misfires.
SUV Towing Impact
The Durango is frequently used for towing, which places additional stress on the engine. Misfires under load indicate potentially more serious issues than idle-only misfires. Document when misfires occur to aid diagnosis.
Diagnostic Approach
Start with ignition system testing across all engines. For HEMI V8s, evaluate MDS operation. Progress to fuel system and mechanical testing as needed to pinpoint the root cause.