Jamis H

I have a 2007 Audi A4 2.0T quattro, We had to jump it today after the radio refused to turn off. After jumping it and driving home we realized the back left brake was smoking. It was super hot like the brake was engaged the entire time. I know the parking brake wasn't on. Other things include 2 missing fuses, fuse 9 which is the brake servo, and fuse 19 which is fog lights. Also when I plugged my obd2 scanner it wouldn't even recognize the car and kept saying error. Mostly what I want to get fixed is the rear driver brake getting way too hot. If anyone has anything please help.

All of the codes from the last time I used the obd2 scanner.
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Cybersombosis

Sounds like your caliper is seized. You will most likely have to get a replacement. Try Rock Auto for cost effective parts if you are going to fix it yourself.