Home >> Jaguar >> 2013 >> XF 2.0 >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Audio Amplifier Module (AAM) -- XF/X250 >> Diagnostic Trouble Code (DTC) Index DTC: Audio Amplifier Module (AAM) >> Description And Operation >> DTC B1A04-1A: Speaker #4 - Circuit resistance below threshold >> Possible Causes