Home › Land Rover › 2016 › Range Rover Autobiography › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Image Processing Module B - Low Line (IPMB - Low Line) -- Range Rover/L405 › Diagnostic Trouble Code Index DTC: Image Processing Module B - Low Line (IPMB - Low Line) › Description And Operation › DTC U1A4B-49: Control Module Processor B - Internal electronic failure › Possible Causes