P1309
Misfire Detection Monitor Not enabled
P1309 is an OBD-II diagnostic trouble code meaning: Misfire Detection Monitor Not enabled. Common causes: malfunction of misfire detection sensors, open or short circuit in the sensor circuit. Estimated repair cost: $6–56.
Symptoms
- Check Engine light comes on
- Increased fuel consumption
- Unstable engine idling
- Reduced engine power
- The vehicle may fail emissions tests
Causes
- Malfunction of misfire detection sensors
- Open or short circuit in the sensor circuit
- Problems with ECU software
- Recently cleared fault codes or replaced the ECU
- Poor contact in sensor connectors
How to Fix
- Check the condition and connection of misfire detection sensors
- Check the integrity of the sensor circuit
- Scan the ECU for other errors
- Update or reflash the ECU software
- Check the condition of the connectors and wiring harness
Related codes
Error P1309 by Vehicle Brand
FAQ
What does the P1309 code mean?
P1309 is an OBD-II diagnostic trouble code that indicates: Misfire Detection Monitor Not enabled
What causes a P1309 error code?
The most common causes of P1309 include: Malfunction of misfire detection sensors; Open or short circuit in the sensor circuit; Problems with ECU software; Recently cleared fault codes or replaced the ECU.
How do I fix a P1309 diagnostic trouble code?
To fix P1309: Check the condition and connection of misfire detection sensors. Check the integrity of the sensor circuit. Scan the ECU for other errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1309?
Yes, but get it checked soon
How much does it cost to fix P1309?
The estimated repair cost for P1309 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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