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Home › Land Rover › 2021 › Defender 90 › Repair and Diagnosis › General Information › Specifications Index › Diagnostic Trouble Code Index DTC: CHASIS Control Module (CHCM) -- Defender/L663 › Diagnostic Trouble Code Index - DTC: Chassis Control Module (CHCM) (G3139555) › Description And Operation › Chassis Control Module (CHCM) › DTC C1B18-94: Module Power Supplies - Unexpected operation › Action

DTC C1B18-94: Module Power Supplies - Unexpected operation: Action

Clear the DTCs and retest. If the fault persists, install a new chassis control module