P1309 – Fuel Rail Pressure Sensor Circuit Low
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Symptoms
- No start
- Stalling
- Weak acceleration
- Check engine light
Causes
- Short to ground
- Damaged wiring
- Faulty sensor
- Connector corrosion
Diagnosis
- Measure sensor voltage
- Inspect wiring
- Check connector
- Scan ECU
Repair
- Repair wiring
- Replace sensor
- Clean connector