Home >> Land Rover >> 2021 >> Discovery S >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Adaptive Speed Control Module (ASCM) -- Discovery/L462 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Adaptive Speed Control Module (ASCM) (G2011724) >> DTC U1A00-87: Private Communication Network - Missing message >> Possible Causes