Home >> Jaguar >> 2015 >> XF 2.0T Premium >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- XF/X250 >> Diagnostic Trouble Code (DTC) Index DTC: Transmission Control Module (TCM) >> Description And Operation >> DTC U0121-63: Lost Communication With Anti-Lock Brake System (ABS) Control Module - Circuit/component protection time-out >> Possible Cause