P1302 – Fuel Rail Pressure Too High
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Symptoms
- Rough idle
- Hesitation
- Poor fuel economy
- Fuel smell
- Check engine light
Causes
- Stuck regulator
- Restricted return line
- Faulty pressure sensor
- ECU control issue
Diagnosis
- Measure rail pressure
- Check return line
- Test regulator
- Scan ECU data
Repair
- Replace regulator
- Repair return line
- Replace pressure sensor