P0191: Fuel Rail Pressure Sensor Circuit Range/Performance
MediumPowertrainFuel System
What does P0191 mean?
P0191 is a diagnostic trouble code indicating "Fuel Rail Pressure Sensor Circuit Range/Performance". The sensor or component is providing readings, but they fall outside the expected operating range. The part may be degraded, contaminated, or experiencing intermittent issues affecting fuel system performance.
Common causes
- Worn or contaminated fuel system component
- Vacuum leak or intake air leak
- Clogged filter or restricted flow
- Intermittent electrical connection issue
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
Get a diagnosis for YOUR car
Code P0191 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.