2009 Lincoln MKS Questions

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happens when I turn a/c on. lasts for a few seconds.
What would make the car loud like a diesel and not want to drive?
My car became difficult to steer and the "tire pressure sensor default" light came on. I took it to a shop and they changed the sensor. When I left the steering was still difficult and the warning light came back on. I don't want to take it back to the same shop because I was not comfortable with their work. Is there a sensor in each Tire and if so how is the faulty one determined?
The above Happens occasionally.only code is po150
For o2 bank 2 sensor 1...
other problem is during braking,tranny will upshift at slow speed pushing vehicle forward unexpectedly.
The noise happens at random doesn't matter if the cars going fast/slow. forward or in reverse.

Changed the spark plugs, wires, and most of the parts to do with the cylinder firing. Still have the code and is still running rough
the air condioner still works but it makes a banging noise while running
My headlights come on but go off after 10-20mins but if i turn the light switch off and back on the lights come back on and continue to do the same. The fog lights stay on as they should. I first thought my light bulbs were bad but that cant be cause they work. It started a month ago with the right side headlamp doing what i describled but last night it switched to the left side which never happened and now the passengered side stays on. I drove about 25mins more in my car last night and now both headlights go out at the same time but come right back on when i turn the interior light switch back on and off. What could this possibly be. I asked the dealership while getting my oil change but they wanted to charge me $200/hr just to diagnose but did tell me if i had to replace my light bulbs that it will be $1,000
Also a popping noise coming from the glove compartment. Will do this on start up or just driving down the rode. It is not a constant, but happens every time the car is driven.
System, but the pedal is still the same what elese can I bleed or what could it be how do I fix this problem
Just had a water pump replaced 2 weeks ago. All belts were off during repair. Dealership stated all belts looked good. Wouldn't it be logic for the dealership to replace the serpentine belt if there was a coolant leak?
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