JCB P0191: Rail Pressure Sensor Fault: Above Maximum Threshold

The system has detected a fault with the rail pressure sensor, indicating that the measured pressure is above the maximum threshold when the key is on. This may affect the proper operation of the engine's fuel system.

1. 1

   The rail pressure sensor

2. 2

   Wiring and connections to the rail pressure sensor

3. 3

   The component identified by this code

1. 1

   Inspect

   Inspect the rail pressure sensor for physical damage or signs of wear.

2. 2

   Check

   Check the wiring and connections to the rail pressure sensor for looseness, corrosion, or damage.

3. 3

   Test

   Test the rail pressure sensor for proper operation using the manufacturer's recommended procedure.

4. 4

   Replace

   If the rail pressure sensor is found to be faulty, replace it with a compatible component.