P1327 – Fuel Pump Relay Stuck On
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Symptoms
- Battery drain
- Fuel pump noise with key off
- Fuel smell
- Check engine light
Causes
- Stuck relay contacts
- ECU control fault
- Short to power
Diagnosis
- Check relay operation
- Inspect wiring for shorts
- Scan ECU
Repair
- Replace relay
- Repair wiring
- Update ECU if needed