Home › Land Rover › 2021 › Range Rover Base › Repair and Diagnosis › Quick Lookups › Common Specs & Procedures › Diagnostic Trouble Code Index DTC: Image Processing Module B (IPMB) -- Range Rover/L405 › General Information › Description And Operation › Diagnostic Trouble Code Index - DTC: Image Processing Module B (IPMB) (G2202346) › DTC U201A-46: Control Module Main Calibration Data - Calibration/parameter memory failure › Possible Causes