Dodge Durango Check Engine Light Codes (Comprehensive Guide)
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This guide consolidates the most common Durango DTCs across 2011–2023 model years. Use it to decode the MIL, prioritize repairs, and avoid parts-cannon replacements.
- Applies to: Durango SXT, GT, Citadel, R/T, SRT trims equipped with 3.6L Pentastar or 5.7L HEMI engines.
- Tools: Enhanced OBD-II scanner (Mode $06$), smoke machine, DVOM, fuel pressure gauge, oscilloscope for O2 analysis.
- Key warning: A flashing MIL means severe misfire. Reduce load immediately to protect catalysts and transmission.
Durango DTC Reference Table
| Code | Subsystem | Model Years Commonly Affected | Likely Cause | First Checks |
|---|---|---|---|---|
| P0300/P0301-P0308 | Ignition/Fuel | 2011–2023 | Coils, spark plugs, injector imbalance, compression loss | Review Mode $06$ misfire data, inspect plugs/coils, swap components, run compression/leak-down. |
| P0430/P0420 | Catalyst | 2011–2023 | Catalyst efficiency drop after misfire or exhaust leak | Check misfire history, inspect exhaust manifold/gaskets, compare upstream/downstream O2 waveforms. |
| P2096/P2098 | Fuel Trim (post-cat) | 2014–2023 | Intake/exhaust leaks, biased O2 sensors, PCV issues | Smoke-test intake/exhaust, inspect PCV valve, monitor STFT/LTFT at idle and cruise. |
| P0456/P0457 | EVAP | 2011–2023 | Loose cap, cracked vapor lines, ESIM leak | Verify cap seal, command purge closed, apply smoke via EVAP service port. |
| P06DD/P06DE | Oil Pump Control | 2013–2023 | Dual-stage pump stuck, incorrect filter, wiring fault | Confirm Mopar filter, measure mechanical oil pressure hot, inspect harness near oil cooler housing. |
| P1DF3/P1DC4 | Stop/Start | 2014–2023 (stop/start) | Weak auxiliary battery, calibration mismatch | Load-test both batteries, inspect grounds, update PCM/TCM, perform stop/start relearn. |
| P0128 | Cooling System | 2011–2016 | Thermostat stuck open, low coolant temperature | Check coolant level, monitor ECT warm-up profile, inspect thermostat operation. |
| P050D | Cold Start Rough Idle | 2014–2023 | Fuel injector issues, intake leaks, carbon deposits | Inspect injectors, smoke-test intake, evaluate fuel trims on cold start. |
How to Use This Table
- Read the code: Capture active/pending/permanent DTCs and freeze-frame data before clearing anything.
- Match the subsystem: Identify whether the fault relates to ignition, fuel trims, EVAP, or oil pump control.
- Triangulate the cause: Use the table to prioritize inspections, starting with misfires that can trigger secondary codes.
- Test methodically: Use Mode $06$, fuel-trim graphs, and mechanical gauge readings to verify suspected causes.
- Confirm with a drive cycle: After repairs, run a 50-mile mixed drive and re-scan to ensure the MIL stays off and monitors are COMPLETE.
Preventive Maintenance Highlights
- Use MS-6395 0W-20/5W-20 oil and Mopar filters every 6,000 miles to protect the dual-stage pump.
- Replace spark plugs per schedule (100k V6 / 30k V8) and torque coils to spec to prevent tracking.
- Inspect intake manifold gaskets, PCV valve, and purge hoses each service interval.
- Check exhaust manifold studs annually; leaks are common on HEMI models.
- Test both batteries twice a year on stop/start-equipped models; weak auxiliary batteries trigger P1DF3.
Frequently Asked Questions
Why does the same code return after clearing?
If the underlying issue is unresolved, the PCM reruns diagnostics and logs the code again. Repair the fault before clearing.
Do I need dealer software to read Mode $06$?
No. Many aftermarket scanners display Chrysler Mode $06$ misfire and catalyst data. Use the information to verify repairs.
How long should I drive after repairs?
Drive roughly 50 miles with city, cruise, and idle segments so readiness monitors confirm the fix.
Great post thanks !