P038C
Ignition I Control Signal Circuit High
Generic OBD-II
Common symptoms
What you'll notice
- Check the ignition coil for any signs of damage or malfunction.
- Test the ignition control module to ensure it is functioning properly.
- Inspect and clean the spark plugs, ensuring they are in good condition.
- Verify the wiring and connections in the ignition system for any faults or loose connections.
- Consider replacing the engine control module if all other possibilities have been ruled out.
Common causes
Most likely first
- Faulty ignition coil or ignition control module
- Damaged or loose wiring in the ignition system
- Faulty ignition switch or key
- Problem with the engine control unit (ECU) or powertrain control module (PCM)
- Issues with the crankshaft position sensor or camshaft position sensor
How to diagnose & fix
Work through it in order
- Engine misfires or stutters
- Decreased fuel efficiency
- Difficulty starting the vehicle
- Vehicle stalls or shuts off unexpectedly
- Illumination of the check engine light
Read & clear P038C yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.