Home >> Jaguar >> 2015 >> XF 2.0T Premium >> Repair and Diagnosis >> General Information >> DTC Index >> 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 P0121-86: Throttle/Pedal Position Sensor A Circuit Range/Performance - Signal invalid >> Possible Causes