DTC U013D-31: Loss of Communication With Vacuum Sensor "A" - No signal: Action
- Refer to the electrical circuit diagrams and check the brake vacuum sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Remove/switch-off any items causing high frequency interference
- Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new brake vacuum sensor as required