Home >> Jaguar >> 2012 >> XJ Base >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Integrated Control Panel (ICP) -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Integrated Control Panel (ICP) >> Description And Operation >> Integrated Control Panel (ICP) >> B1A85-84 Ambient Light Sensor - Signal below allowable range >> Possible Causes