Dodge Charger Check Engine Light: Reset Without Guesswork
Whether you own a V6 SXT or a supercharged Hellcat, the Charger’s PCM logs diagnostic trouble codes (DTCs) any time a subsystem drifts beyond limits. Use this workflow to investigate the fault, repair it properly, and reset the MIL safely.
- Platform: 2006–2023 Dodge Charger (LX/LD).
- Before you begin: Scan the vehicle, save freeze-frame data, check battery voltage and ground integrity.
- Tools: OBD-II scanner with live data, spark tester, fuel pressure gauge, smoke tester, basic hand tools.
Common Charger Codes & Causes
| Code | Subsystem | Likely Cause | Quick Fix |
|---|---|---|---|
| P0300–P0308 | Ignition | Coil or spark plug failure, lifter wear | Swap coils/plugs, inspect lifters, run compression test. |
| P0456/P0457 | EVAP | Gas cap leak, cracked purge/vent hose, ESIM fault | Install OEM cap, smoke-test EVAP lines, repair ESIM assembly. |
| P0128 | Cooling | Thermostat stuck open | Replace thermostat, bleed the cooling system, verify coolant level. |
| P2096/P2098 | Post-cat fuel trim | Exhaust leak, lazy O2 sensor, misfire | Fix misfires, inspect exhaust joints, monitor O2 switching. |
| P1DF3 | Transmission | 8HP adaptive values out of range | Check ATF level/condition, run Quick Learn procedure. |
Proper Reset Workflow
- Scan & document: Record all PCM/TCM codes, freeze-frame, Mode $06$ misfire counters and fuel trims.
- Diagnose & repair: Follow the subsystem table—replace coils or plugs, repair EVAP leaks, clean the throttle body, update software, etc.
- Verify: Ensure trims and sensor readings normalize, misfire counters remain zero, and transmission adaptives are stable.
- Clear with a scan tool: Use Mode $04$ after fixing the fault. Avoid battery disconnects; they only erase adaptives temporarily.
- Drive cycle: Drive 30–50 miles in mixed traffic so readiness monitors report “complete.”
- Re-scan: Confirm no pending or permanent codes remain. If the MIL returns, repeat diagnostics.
Frequently Asked Questions
Can I clear the light by disconnecting the battery?
Only temporarily. The PCM relearns quickly, and the MIL returns if the fault remains. Always repair the root cause first.
The light is flashing—what now?
A flashing MIL means a severe misfire. Reduce throttle immediately and fix the misfire to protect the catalytic converters.
How long until the light stays off?
Once the fault is fixed, the MIL stays off. Readiness monitors usually reset after 30–50 miles of mixed driving.
Related Guides
Explore the Challenger check engine light guide and Dodge transmission troubleshooting for more workflows.