P1312 – Injector Control Pressure Too High
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Symptoms
- Rough idle
- Hesitation
- Poor fuel economy
- Check engine light
Causes
- Stuck regulator
- Restricted return
- Faulty sensor
- ECU issue
Diagnosis
- Measure pressure
- Check return line
- Test sensor
- Scan ECU
Repair
- Replace regulator
- Repair return line
- Replace sensor