I recently replaced my alternator, and bought a new battery (today).

I am un-abled to clear the "Trans. Failsafe Prog" mode, which means it drives in limp mode. I have a feeling its' all related to electricity. It logs the P0102 fault via my ODB2 reader.

I'm very new, so may have missed something basic

• My voltage at ignition position 1 & 2 is 11.9v.
• At running (idle) it's 13.6v (shows that read for 5 seconds, the the Trans. Failsafe comes on).
• I cleared the Fault ECU codes, but the Trans Failsafe immediately comes back. (sensor airflow pending fault). This is at position 2, idling, and while driving.

Maybe unrelated, but...

• If I unplug the MAF sensor while the engine is running, the engine keeps running.
  
• I just tried to plug a cigarette USB port into the socket- it sparked and stopped working (the USB). I tried another USB (very briefly) and it made a whining noise, so I unplugged it immediately...
  
• I hear this clicking/ticking sound from the passengers side (in Australia, so LHD) which is the rear passenger window trying to go up (by itself!). Here is a video of how it sounds

What can I do to remove this Trans. Failsafe error?

Please help out with any suggestions.

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02' X5 E53 3.0i Petrol (210k km/130k miles)
Will trade coding skills (Javascript, React, Node, Django, Mobile dev) for car knowledge
ODB II: ELM 327 (Torque Pro app)