What this code means

The DME detected a severe misfire on Cylinder 4 triggering fuel cut-off to protect the catalytic converter. This is a catalyst protection strategy that disables fuel delivery to the misfiring cylinder.

Symptoms

• Check Engine Light flashing
• Rough running
• Reduced power
• Engine vibration at idle

Common causes

• Faulty ignition coil Cylinder 4
• Worn or fouled spark plug Cylinder 4
• Injector failure Cylinder 4
• Low compression Cylinder 4
• Intake manifold leak

Diagnostic steps

1. Check misfire counters
2. Swap ignition coil from Cylinder 4
3. Replace spark plug Cylinder 4
4. Test injector Cylinder 4
5. Compression test

Repair notes

Replace the faulty ignition component on Cylinder 4.

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