What this code means

The ECU detected a short to positive (battery voltage) in the Cylinder 1 fuel injector circuit. This prevents proper injector control and causes a misfire or over-fueling condition on that cylinder.

Symptoms

• Check Engine Light
• Misfire on Cylinder 1
• Rough idle
• Possible rich condition
• Reduced power

Common causes

• Damaged injector wiring shorted to power
• Faulty fuel injector Cylinder 1
• Connector damage or melted wire
• ECU injector driver failure

Diagnostic steps

1. Test injector resistance Cylinder 1
2. Inspect wiring for damage or shorts to power
3. Check injector connector
4. Swap injector with another cylinder to isolate
5. Test ECU driver output

Repair notes

Repair the shorted wiring or replace the faulty fuel injector on Cylinder 1.

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