P031E
Ignition D Control Signal Circuit Low
Generic OBD-II
Common symptoms
What you'll notice
- Check for loose or damaged wiring connections in the ignition control circuit
- Inspect and replace the ignition control module if necessary
- Check and replace the ignition coils if they are faulty or damaged
- Inspect and clean the spark plugs to ensure proper ignition
- Consider replacing the engine control unit (ECU) if all other solutions fail
Common causes
Most likely first
- Faulty ignition coil
- Malfunctioning ignition control module
- Loose or damaged ignition control module wiring
- Defective ignition switch
- Faulty engine control unit (ECU)
How to diagnose & fix
Work through it in order
- Car or motorcycle may not start or have difficulty starting.
- Engine may misfire or have poor acceleration.
- Check Engine Light may illuminate on the dashboard.
- Vehicle may stall or shut off while driving.
- Fuel efficiency may decrease due to inefficient ignition control.
Read & clear P031E yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.