Fuel Rail Pressure Sensor Circuit Range/Performance Bank 1
The engine computer is not seeing a fuel pressure reading that makes sense. This can happen if the fuel pressure sensor, wiring, fuel pump, or fuel pressure regulator is failing. The engine may run poorly, hesitate, stall, or not start.
You may be able to drive short distances if the engine runs normally, but the problem can cause stalling, poor power, or a no-start condition. Avoid long trips and get it checked soon.
P0191 means the powertrain control module detected fuel rail pressure sensor input that is outside the expected range or does not match commanded fuel pressure. The fault may be in the sensor signal, sensor power or ground, wiring, fuel pressure control system, or actual fuel pressure. The code is set when the reading is implausible, unstable, or inconsistent with engine operating conditions.
Bad fuel can contribute to fuel system problems, but P0191 is usually caused by a sensor, wiring, or fuel pressure control issue.
Yes. If fuel pressure is too low or the signal is wrong enough, the engine may crank but not start.
Sometimes, but only if the sensor is actually faulty. Wiring and real fuel pressure problems are also common.
No. If the engine is running poorly or stalling, it should be diagnosed before further driving.