Home >> Land Rover >> 2021 >> Discovery S >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Tailgate Control Module (TGCM) -- Discovery/L462 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Tailgate Control Module (TGCM) (G2016126) >> DTC U0401-68: Invalid Data Received From ECM/PCM A - Event information >> Possible Causes