Home >> Jaguar >> 2018 >> XF S, AWD >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Head-Up Display Cooling Fan Control Module -- XF/X260 >> Diagnostic Trouble Code Index DTC: Head-Up Display Cooling Fan Control Module >> Description And Operation >> Head Up Display Cooling Fan Control Module (HUDCFCM) >> DTC U0001-81: High Speed CAN Communication Bus - Invalid serial data received >> Possible Causes