Home >> Land Rover >> 2021 >> Range Rover Base >> Repair and Diagnosis (Single Page) >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: Audio Amplifier Module (AAM) -- Range Rover/L405 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Audio Amplifier Module (AAM) (G2187165) >> DTC B128B-13: Speaker #14 - Circuit open >> Possible Causes