What usually causes it
- A failing fuel rail pressure sensor
- A clogged fuel filter or weak fuel pump
- A leaking fuel pressure regulator
- A loose plug or damaged wiring
P0191Starts at: Get it checked this week
Fuel rail pressure sensor reading does not fit
This sensor reads the fuel pressure in the fuel rail, the pipe that feeds the injectors. Its reading does not match what the engine needs.
What to watch for
- Hard starting or stalling
- Weak power, mostly when you press hard on the gas
- A strong smell of gas
Can I keep driving?
We rate P0191 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
Quick answers about P0191
What does P0191 mean?
Fuel rail pressure sensor reading does not fit. This sensor reads the fuel pressure in the fuel rail, the pipe that feeds the injectors. Its reading does not match what the engine needs.
Can I keep driving with P0191?
We rate P0191 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
What usually causes P0191?
The most common causes, in order: A failing fuel rail pressure sensor; A clogged fuel filter or weak fuel pump; A leaking fuel pressure regulator; A loose plug or damaged wiring.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.