JCB P0091: Low Signal Control Circuit of the Fuel Pressure Regulator 1

The system has detected a low signal in the control circuit of the fuel pressure regulator 1. This may affect the proper operation of the fuel pressure regulation system.

1. 1

   The wiring and connections related to the fuel pressure regulator 1

2. 2

   The signal output from the control unit to the fuel pressure regulator 1

1. 1

   Inspect the wiring and connections

   Check for any damage, corrosion, or loose connections in the wiring and connectors associated with the fuel pressure regulator 1.

2. 2

   Test the signal output

   Use a diagnostic tool to verify the signal output from the control unit to the fuel pressure regulator 1.