DTC C1A20-64: Pressure Increase Too Slow When Filling Reservoir - Signal plausibility failure: Action
- Check the gallery pipes and reservoir pipes for leaks, correct routing and installation. Check the integrity of the air reservoir. Repair/renew as required, clear DTC and retest
- Refer to the approved diagnostic system for corner, reservoir and exhaust valve checks. Check the corner valve for leaks. Repair/renew as required, clear DTC and retest
- Check the operation of the air suspension air supply unit. Repair or replace as required, clear DTC and retest
- Check the air suspension air supply unit intake filter, intake pipe and silencer for blockages/restrictions. Repair as required, clear DTC and retest