Home › Jaguar › 2012 › XKR 2D Convertible › Repair and Diagnosis › Engine Performance › Engine Control Systems › Diagnostic Trouble Code Index DTC: Engine Control Module (ECM) 5.0L SC V8 -- XK/X150 › Diagnostic Trouble Code Index DTC: Engine Control Module (ECM) 5.0L SC V8 - AJ133 › Description And Operation › Engine Control Module [Pcm] 5.0L SC V8 - AJ133 › DTC B11DB-87: Battery Monitoring Module - Missing message › Possible Causes