P1191 – Fuel Pressure Sensor High Input
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Symptoms
- Rough idle
- Poor fuel economy
- Black smoke
- Hesitation
- Check engine light
Causes
- Faulty pressure sensor
- Injector leak
- Regulator issue
- Wiring issue
- ECU issue
Diagnosis
- Inspect wiring
- Test pressure sensor
- Inspect injectors
- Check regulator
- Scan live data
Repair
- Replace pressure sensor
- Replace injectors
- Replace regulator
- Repair wiring
- Update ECU