Home >> Land Rover >> 2017 >> Range Rover Autobiography >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Diagnostic Trouble Code Index DTC: BLINDSPOT Monitoring Control Module - Left/Right (BMCM) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: BLINDSPOT Monitoring Control Module - Left / Right (BMCM) >> Description And Operation >> DTC U0046-86: Vehicle Communication Bus C - Signal invalid >> Possible Causes