P1229 – Fuel Pump Control Range/Performance
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Symptoms
- Loss of power
- Hesitation
- Hard starting
- Surging
- Check engine light
Causes
- Weak fuel pump
- Control module fault
- Wiring resistance
- Poor ground
- Fuel restriction
Diagnosis
- Compare commanded vs actual pressure
- Check pump current
- Inspect wiring
- Check grounds
- Scan live data
Repair
- Replace fuel pump
- Replace control module
- Repair wiring
- Clean grounds
- Replace fuel filter