Ignition L Control Signal Circuit Low

Common symptoms

What you'll notice

• Check and replace the ignition coil if necessary
• Inspect and clean the ignition control module connections
• Verify and repair any damage to the ignition control module wiring harness
• Replace the engine control module (ECM) if all other solutions do not resolve the issue

Common causes

Most likely first

1. Faulty ignition control module
2. Malfunctioning ignition coil
3. Loose or damaged ignition control signal wiring
4. Defective ignition switch
5. Faulty engine control module (ECM)

How to diagnose & fix

Work through it in order

1. Engine misfiring or rough idling
2. Difficulty starting the vehicle
3. Loss of power and acceleration
4. Engine stalling or dying unexpectedly
5. Illumination of the check engine light