Checking the wiring and sensor

Check the wiring between pressure sensor 1 connection:

for an intermittent open circuit as described in Open-circuit, intermittent faults , an intermittent short circuit to ground as described in Short-circuit to ground, intermittent faults , and an intermittent short circuit to voltage supply as described in Short-circuit to supply voltage, intermittent faults .

Do the necessary corrective action.

Additional information:

Fig 1: Identifying Pedal Position Sensor Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Brake Pressure Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.