P1186 – Fuel Pressure Monitoring Malfunction
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Symptoms
- Hesitation
- Poor acceleration
- Hard starting
- High fuel trims
- Check engine light
Causes
- Faulty pressure sensor
- Weak fuel pump
- Clogged filter
- Injector issue
- ECU issue
Diagnosis
- Test fuel pressure
- Inspect pump
- Inspect injectors
- Check filter
- Scan live data
Repair
- Replace pressure sensor
- Replace fuel pump
- Replace filter
- Replace injectors
- Update ECU