2013 Dodge Avenger Check Engine Light: Troubleshooting Guide
When the MIL illuminates on a 2013 Avenger, the PCM has detected a problem in the emissions, ignition or transmission system. This guide gives you the most common codes, a diagnostic flow, and the steps to stop the warning from coming back.
- Powertrains: 2.4L Tigershark, 3.6L Pentastar V6, 6-speed automatic.
- Initial actions: Scan for DTCs, save freeze-frame data, check battery voltage and grounds.
- Tools: OBD-II scanner, smoke tester, multimeter, fuel pressure gauge, spark tester.
Frequent 2013 Avenger Codes
| Code | Symptoms | Likely Cause | Diagnostic Tip |
|---|---|---|---|
| P0300/P030x | Rough idle, flashing MIL | Ignition coil, spark plug, injector or vacuum leak | Swap coils/plugs, check injector pulse, smoke-test intake. |
| P0440/P0456 | Fuel odor, MIL after refueling | Gas cap, purge/vent valve leak, cracked EVAP lines | Install OEM cap, smoke-test EVAP, inspect ESIM. |
| P0128 | Coolant temperature low, HVAC slow to heat | Thermostat stuck open, low coolant | Replace thermostat, bleed system, verify coolant level. |
| P0740/P0732 | Harsh shifts, limp mode | 62TE torque converter clutch, solenoid pack | Measure ATF level/condition, scan TCM, run quick-learn procedure. |
Step-by-Step Diagnostic Flow
- Collect data: Record all codes, freeze-frame, fuel trims and Mode $06$ misfire counters.
- Visual inspection: Check ignition components, vacuum hoses, throttle body, EVAP lines and wiring harnesses.
- Run targeted tests: Swap coils/bujis for misfires, smoke-test EVAP for P0456, verify fuel pressure for lean codes.
- Transmission checks: For P0740/P0732, inspect ATF level, read TCM data and run the adaptive relearn procedure.
- Repair & verify: After each fix, clear codes, drive 30–50 miles and ensure trims stay within ±10%.
FAQs
The light keeps returning after I clear it. Why?
The underlying fault still exists. Re-scan for pending/permanent codes and follow the diagnostic table to repair the cause.
Can I drive with a steady MIL?
If the car runs normally, you can drive short distances but schedule diagnostics soon. A flashing MIL means stop driving and fix the misfire immediately.
Where to Go Next
Need more help? See the transmission troubleshooting guide and the Dodge Dart check engine guide for additional coverage.