2015 Dodge Durango Check Engine Light Issues
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The 2015 Durango builds on the 2014 platform with revised PCM calibrations, dual-stage oil pumps, and optional stop/start. When the check engine light turns on, the PCM records data that explains the fault. This guide highlights common codes, diagnostic steps, and preventive maintenance so the MIL stays off.
- Applies to: 2015 Durango SXT, Limited, R/T, Citadel, special packages.
- Tools: Enhanced OBD-II scanner (Mode $06$), smoke machine, fuel pressure transducer, DVOM, mechanical oil-pressure gauge.
- Critical warning: A flashing MIL signals severe misfire. Reduce load immediately to protect the catalysts.
Common 2015 Durango Codes
| Code | Subsystem | Likely Cause | First Checks |
|---|---|---|---|
| P0300/P030x | Ignition/Fuel | Coils, spark plugs, injector imbalance, compression loss | Review misfire counters, inspect plugs/coils, swap components, perform compression test. |
| P0430 | Catalyst | Bank 2 catalyst efficiency below threshold | Check for misfire history, inspect exhaust leaks, compare O2 sensor waveforms. |
| P2098 | Fuel Trim | Post-cat lean condition | Smoke-test intake/exhaust, inspect PCV valve, monitor fuel trims at 55 mph cruise. |
| P06DD/P06DE | Oil Pump Control | Dual-stage pump stuck or wiring issue | Confirm Mopar filter, measure mechanical oil pressure, inspect harness near oil cooler. |
| P1DF3 | Stop/Start (if equipped) | Weak auxiliary battery, calibration mismatch | Load-test both batteries, check grounds, update PCM/TCM, perform stop/start relearn. |
Diagnostic Workflow
- Capture data: Save DTCs, freeze-frame snapshots, Mode $06$ misfire results, fuel trims, and permanent codes.
- Fix misfires first: Replace plugs, swap coils, test injector balance, and verify compression to prevent catalyst damage.
- Evaluate fuel trims/catalysts: Repair intake/exhaust leaks, then road-test while graphing O2 sensors and trims.
- Inspect oil pump control: For P06DD/P06DE, attach a mechanical gauge and confirm pressure at hot idle and 3,000 rpm; inspect harness for chafing.
- Assess stop/start faults: Test both batteries, inspect ground straps, and update calibrations. Run stop/start relearn after repair.
- Complete the drive cycle: Clear codes, drive 50 miles with city, cruise, and idle segments, and re-scan for pending/permanent DTCs.
Driving Guidance During Diagnosis
- Reduce throttle and avoid towing when the MIL flashes or the engine runs rough.
- EVAP-only codes allow limited driving, but repair them before inspection deadlines.
- Monitor oil pressure, coolant temperature, and transmission temperature to prevent secondary failures.
Preventive Maintenance Checklist
- Change MS-6395 0W-20/5W-20 oil and Mopar filters every 6,000 miles.
- Replace spark plugs per schedule (100k V6 / 30k V8) and torque coils to specification.
- Inspect intake gaskets, PCV system, and purge hoses each service interval.
- Check exhaust manifold studs annually to prevent lean and catalyst codes.
- Test both batteries twice a year on stop/start-equipped models.
Frequently Asked Questions
Is P0430 always a failed catalyst?
No. Fix misfires and fuel-trim issues, take a highway drive, and retest before replacing the converter.
Can I clear codes by disconnecting the battery?
Battery disconnects clear adaptives but the MIL returns if the fault remains. Use a scan tool after repairs.
How long until the MIL stays off?
After repairs, drive roughly 50 miles with mixed conditions to allow monitors to reset and confirm the fix.
Related Durango Resources
- 2015 Durango MIL guide.
- Transmission troubleshooting for eight-speed units.
- No-spark diagnostics for deeper ignition testing.