Home >> Land Rover >> 2018 >> Range Rover Autobiography >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Audio Amplifier Module (AAM) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Audio Amplifier Module (AAM) >> Description And Operation >> DTC B1A09-4A: Speaker #9 - Incorrect component installed >> Possible Causes