Home >> Land Rover >> 2021 >> Discovery S >> Repair and Diagnosis (Single Page) >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Audio Amplifier Module (AAM) -- Discovery/L462 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Audio Amplifier Module (AAM) (G2263504) >> DTC B128C-1A: Speaker #15 - Circuit resistance below threshold >> Possible Causes