BMW fault code A9DA
Electric A/C compressor
Electric A/C compressor: Restricted function due to limitation in motor current of electric A/C compressor
Module version: Electric A/C compressor (EKK_72)
In: X6 (E72) 2009–2011
Reading and clearing it
Fault code A9DA is a BMW code, stored in the car's electric a/c compressor, not a generic OBD2 code (P0xxx): a generic OBD2 reader only reaches the engine's emissions faults, so it won't show it. AutoLingo for BMW reads it with BMW's own diagnostic protocols, in plain English, with the details the module stored about it, and clears it after a repair. If a fault comes right back after it's cleared, the problem is still there.
The electric a/c compressor is on: X6 (E72)
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