Powertrain
generic / SAE
P0191
Fuel Rail Pressure Sensor Circuit Range / Performance
The fuel rail pressure sensor signal is within electrical limits but doesn't match commanded rail pressure under various engine loads. Common in common-rail diesel and GDI petrol engines.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 91
Possible causes
- Pressure sensor drifted high
- Pressure regulator stuck medium
- High-pressure pump worn low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–6 h
- Component: fuel rail pressure sensor
- Component: high pressure pump
- Component: rail pressure regulator
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012