Home >> Land Rover >> 2021 >> Discovery S >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Parking Aid Control Module (PAM) -- Discovery/L462 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Parking Assist Control Module (PAM) (G2166391) >> DTC U0046-81: Vehicle Communication Bus C - Invalid serial data received >> Possible Causes