What this code means

The ECM detected a malfunction in the ignition circuit or ignitor module. The ignition system is not firing correctly, which can cause misfires across multiple cylinders.

Symptoms

• Check Engine Light
• Misfires on multiple cylinders
• Rough running
• Loss of power
• Hard starting

Common causes

• Faulty ignition module
• Failed ignition coil(s)
• Wiring fault in ignition circuit
• ECM ignition driver failure
• Corroded ignition connector

Diagnostic steps

1. Test ignition coil primary and secondary resistance
2. Inspect ignition module connector
3. Check ignition circuit wiring
4. Test ECM ignition output
5. Check for spark at each cylinder

Repair notes

Replace the faulty ignition coil or ignition module.

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