Home >> Jaguar >> 2012 >> XJ L >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Adaptive Speed Control Module (ASCM) -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Adaptive Speed Control Module (ASCM) >> Description And Operation >> Adaptive Speed Control Module (ASCM) >> U0417-81 Invalid Data Received From Park Brake Control Module - Invalid serial data received >> Possible Causes