Home >> Land Rover >> 2021 >> Defender 110 X-Dynamic SE >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Audio Amplifier Module (AAM) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Audio Amplifier Module (AAM) (G2804413) >> Description And Operation >> Audio Amplifier Module (AAM) >> DTC B128D-1A: Speaker #16 - Circuit resistance below threshold >> Possible Causes