Home › Land Rover › 2015 › LR4 Base, 4WD › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Air Suspension Control Module -- LR4/L319 › Diagnostic Trouble Code Index DTC: Air Suspension Control Module › Description And Operation › DTC C1B18-62: Module Power Supplies - Signal compare failure › Possible Causes