What this code means

The ECU detected a short to ground in the fuel pump relay control circuit. The relay may be stuck in the on position or not responding to ECU commands.

Symptoms

• Check Engine Light
• Fuel pump may not shut off
• Possible no-start if circuit is open
• Intermittent fuel pump operation

Common causes

• Wiring shorted to ground
• Faulty fuel pump relay
• Damaged relay connector
• Water intrusion in relay box
• ECU driver fault

Diagnostic steps

1. Test relay control circuit for ground shorts
2. Inspect wiring insulation
3. Check relay socket for corrosion
4. Test relay coil resistance
5. Check ECU driver output

Repair notes

Repair the shorted wiring or replace the fuel pump relay.

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