Home >> Land Rover >> 2015 >> Range Rover Autobiography >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Suspension Control Module (CHCM) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Suspension Control Module (CHCM) >> Description And Operation >> DTC C1A20-64: Pressure Increase Too Slow When Filling Reservoir - Signal plausibility failure >> Possible Causes