What this code means

Misfire detected during the first 1000 engine revolutions after startup.

Symptoms

• Check Engine Light after cold start
• Rough start then smooths out
• Stumble on startup

Common causes

• Leaking fuel injector (dripping when off)
• Loss of fuel pressure after shutdown
• Spark plug fouled from previous shutdown

Diagnostic steps

1. Perform fuel pressure leak-down test
2. Check injectors for leaks
3. Inspect spark plugs
4. Monitor misfire counts on cold start

Repair notes

Check for leaking injectors. Replace fouled spark plugs.

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