Home › Jaguar › 2012 › XJ Base › Repair and Diagnosis › General Information › DTC Index › Diagnostic Trouble Code (DTC) Index DTC: Anti-Lock Brake System Control Module (Abs) -- XJ/X351 › DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Anti-Lock Brake System Control Module (ABS) › Description And Operation › Anti-Lock Brake System Control Module (Abs) › C0031-2F Left Front Wheel Speed Sensor - Signal erratic › Possible Causes