P1363 Code Description
The diagnostic code P1363 indicates a problem with the secondary circuit of ignition coil “D” in the vehicle’s ignition system. The ignition coil is responsible for transforming the battery’s low voltage into the high voltage needed to create a spark in the spark plugs, which ignites the air-fuel mixture in the engine cylinders. In this case, the secondary circuit of ignition coil “D” is not functioning properly, which can lead to misfires, rough idling, poor fuel consumption, and even engine stalling.
Common Causes of P1363
NOTE: The listed causes may not be a complete list of all potential problems, and there may be other causes.
- Faulty ignition coil “D”
- Damaged wiring or connectors in the secondary circuit
- Issues with the engine control module (ECM)
- Corrosion or contamination of ignition system components
- Electrical problems such as a blown fuse or relay affecting the ignition system
Symptoms of P1363
- Engine misfires
- Rough idling or vibrations
- Decreased fuel efficiency
- Engine stalling
- Loss of power or hesitation during acceleration
How to Fix P1363
- Diagnose the issue using a scan tool to read the error code and identify the specific ignition coil “D” that is malfunctioning.
- Inspect the wiring and connectors of the secondary circuit for any damage, corrosion, or loose connections.
- Test the resistance and continuity of ignition coil “D” using a multimeter to determine if it needs to be replaced.
- Replace the faulty ignition coil “D” if necessary and ensure all connections are secure.
- Clear the error code from the vehicle’s ECM and test the ignition system to confirm the issue has been resolved.