Home › Jaguar › 2018 › F-Pace Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Deployable TOWBAR Control Module (DTCM) - F-Pace › Diagnostic Trouble Code Index DTC: Deployable Towbar Control Module (DTCM) › Description And Operation › Deployable TOWBAR Control Module (DTCM) › DTC B1548-23: Trailer Light Test Button - Signal stuck low › Possible Causes