P03FD
Ignition L Control Signal Circuit/Open
Generic OBD-II
Common symptoms
What you'll notice
- Check the ignition control module for any loose connections or damaged wires.
- Inspect the ignition coil and ignition control module for any signs of malfunction or failure.
- Test the ignition control module using a diagnostic tool to identify any specific issues or errors.
- Replace the ignition control module if it is determined to be defective or faulty.
- Verify and repair any issues with the ignition wiring circuit, if necessary.
Common causes
Most likely first
- Faulty ignition coil
- Malfunctioning ignition control module
- Defective ignition switch
- Loose or damaged wiring in the ignition system
How to diagnose & fix
Work through it in order
- Engine misfires or stumbles
- Loss of power or acceleration
- Difficulty starting the engine
- Poor fuel efficiency
- Illuminated check engine light
Read & clear P03FD yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.