Fuel Rail Pressure Sensor Circuit
The fuel rail pressure sensor is not reading within the expected range.
Have this diagnosed before driving further
Informational only. Consult a qualified mechanic.
- Faulty fuel rail pressure sensor
- Low fuel pressure
- Fuel pump issue
- Clogged fuel filter
Check fuel pressure and replace sensor.
What does P0191 mean?
The P0191 OBD-II diagnostic trouble code (DTC) indicates: fuel rail pressure sensor circuit. This is a high-severity powertrain code that your vehicle's onboard diagnostics system triggers when the fuel rail pressure sensor is not reading within the expected range. If your check engine light is on with this code, you should have the vehicle inspected immediately before driving further.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
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