Home >> Land Rover >> 2022 >> Defender 90 V8 >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Trailer Control Module (TRM) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Trailer Control Module (TRM) (G2445144) >> Description And Operation >> Trailer Control Module (TRM) >> DTC B1407-44: Trailer Module - Data memory failure >> Possible Causes