Home >> Land Rover >> 2022 >> Defender 90 V8 >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Anti-Lock Brake System Control Module (Abs) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Anti-Lock Brake System Control Module (Abs) (G3134779) >> Description And Operation >> Anti-Lock Brake System Control Module (Abs) >> DTC P064F-46: Unauthorized Software/Calibration Detected - Calibration/parameter memory failure >> Possible Causes