Home >> Land Rover >> 2013 >> Range Rover Supercharged >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Image Processing Module (IPMA) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Image Processing Module (IPMA) >> Description And Operation >> DTC B151F-31: Auxiliary Cooling Fan - No signal >> Possible Causes