Okay so I went to buy some food at night, and I realized that after pulling out of the drive through window that my car was thrown into limp. I didn't know why at the moment, but I always keep a scanner with me. Tried to run a code, but nothing popped up... so I drove home(.4 miles) and then my car started shaking right when i started going up my driveway and saw that my tire was flat, and destroyed but i changed it. Started car and drove a little bit, car kept going into limp mode... usually at a sharp turn or bumpy road. Code is p1121, only happened after the flat tire! It can't actually be the APPS right? the wheel is the driver side rear.

 

It's the APPS for sure if your car is going into limp mode. There is nothing related to the wheels that would throw a P1121. It's just an unfortunate coincidence both happened at once.