Home › Jaguar › 2018 › F-Pace Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) - F-Pace › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) › Description And Operation › Transmission Control Module (TCM) › DTC P0726-21: Engine Speed Input Circuit Range/Performance - Signal amplitude < minimum › Possible Causes