What does code P0191 mean?
The fuel rail pressure sensor reports values outside the expected range
OBD-II Code
P0191 — Fuel Rail Pressure Sensor Range or Performance
The fuel rail pressure sensor reports values outside the expected range
Common symptoms
- Hesitation
- stalling
- lean or rich mixture
Possible causes
- Unstable pressure
- contaminated sensor
- weak fuel pump
Initial recommendation
Measure pressure, inspect regulator and fuel pump.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0191 with your vehicle's actual symptoms for more complete diagnostic guidance.
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