DTC C1A11-64: Pressure Increases When System Inactive - Signal plausibility failure: Action
- Check for an air spring leak. Check the air harness for evidence of melting, crushing, kinking or collapsing. Repair/renew as required, clear the DTCs and retest
- If the fault persists, check the reservoir pipes and the front and rear valve block pipes for correct routing and installation. Repair/renew as required, clear the DTCs and retest
- Refer to the Jaguar Land Rover approved diagnostic equipment for corner, reservoir and exhaust valve checks. Check the corner valve for leaks. Repair/renew as required, clear the DTCs and retest
- Refer to the electrical circuit diagrams and check the air suspension air pressure sensor circuit for short circuit to ground, short circuit to power, short circuit to another circuit, open circuit, high resistance. Repair circuit as required, clear the DTC and retest
- If the fault persists, install a new rear valve block