P1301 – Fuel Rail Pressure Too Low
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Symptoms
- Hard starting
- Stalling
- Weak acceleration
- Poor fuel economy
- Check engine light
Causes
- Weak fuel pump
- Clogged fuel filter
- Leaking injector
- Faulty pressure regulator
- Wiring issue
Diagnosis
- Measure rail pressure
- Check pump voltage
- Inspect injectors
- Test pressure regulator
- Scan for related codes
Repair
- Replace fuel pump
- Replace filter
- Repair wiring
- Replace regulator