Home >> Jaguar >> 2017 >> XJR Base >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Audio Amplifier Module (AAM) -- XJ/X351 >> Diagnostic Trouble Code (DTC) Index DTC: Audio Amplifier Module (AAM) >> Description And Operation >> Audio Amplifier Module (AAM) >> B128A-1A: Speaker #13 - Circuit resistance below threshold >> Possible Causes