P1304 – Fuel Pump Control Circuit High
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Symptoms
- No start
- Stalling
- Fuel smell
- Poor performance
- Check engine light
Causes
- Short to power
- Faulty relay
- Damaged wiring
- Pump driver fault
Diagnosis
- Check wiring for shorts
- Test relay
- Scan pump driver module
- Measure pump voltage
Repair
- Repair wiring
- Replace relay
- Replace pump driver module