P1365
Ignition Coil Secondary Circuit Failure
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Misfire in one or more cylinders
- Unstable engine idling
- Reduced engine power
- Increased fuel consumption
- Difficulty starting the engine
Causes
- Faulty ignition coil
- Damaged high voltage wires
- Worn or faulty spark plugs
- Poor contact in the ignition coil connectors
- Engine control module (ECU) malfunction
How to Fix
- Check the condition of the spark plugs and replace if necessary.
- Inspect high voltage wires for damage
- Check the resistance of the ignition coil
- Check the contacts in the ignition coil connectors
- If necessary, replace the ignition coil