Home › Land Rover › 2015 › LR4 Base, AWD › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Central Junction Box (CJB) -- LR4/L319 › Diagnostic Trouble Code Index DTC: Central Junction Box (CJB) › Description And Operation › DTC U2017-51: Control Module Software #2 - Not programmed › Possible Causes