P0191
Fuel Rail Pressure Sensor Circuit Range/Performance Bank 1
P0191 is an OBD-II diagnostic trouble code meaning: Fuel Rail Pressure Sensor Circuit Range/Performance Bank 1. Common causes: malfunction of the fuel rail pressure sensor, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- Unstable engine operation
- Power Loss
- Increased fuel consumption
- Difficulty starting the engine
- Check Engine Light
Causes
- Malfunction of the fuel rail pressure sensor
- Open or short circuit in wiring harness
- Poor contact in the sensor connector
- Fuel pump malfunction
- Clogged fuel filter
- Problems with the fuel pressure regulator
How to Fix
- Check the integrity of the wiring harness to the sensor
- Check connections and contacts in the sensor connector
- Measure the resistance and reference voltage of the sensor
- Check the pressure in the fuel rail with a mechanical pressure gauge
- Replace pressure sensor if necessary
- Check the operation of the fuel pump and the condition of the filter
Related codes
Error P0191 by Vehicle Brand
FAQ
What does the P0191 code mean?
P0191 is an OBD-II diagnostic trouble code that indicates: Fuel Rail Pressure Sensor Circuit Range/Performance Bank 1
What causes a P0191 error code?
The most common causes of P0191 include: Malfunction of the fuel rail pressure sensor; Open or short circuit in wiring harness; Poor contact in the sensor connector; Fuel pump malfunction.
How do I fix a P0191 diagnostic trouble code?
To fix P0191: Check the integrity of the wiring harness to the sensor. Check connections and contacts in the sensor connector. Measure the resistance and reference voltage of the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0191?
Limited driving only, diagnose soon
How much does it cost to fix P0191?
The estimated repair cost for P0191 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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