Check engine light is on. OBD reads p0191 &

Usually under the dash to left of driver. Some fuses are under hood in fuse box there.

Check your temp sensor(s).

alternator belt braking would not stall the engine but your dash would of lit up like a christmas tree. you will need to have the engine on an obd reader to see what the problem is. did the belt snap or was it stripped ? alternator over load would cut the engine out check the fuse in the engine fuse box there is 2, 80 amp fuse in there check these are fine.

Unless is was the one doing the testing I can not say that it will fix the problem. I would check the fuel pressure, the fact you have a rich code (P0172) means you may have excessive fuel pressure and the sensor is reading that.I assume this is a four or six cylinder and you have only one bank of cylinders. Check the fuel pressure before you do any parts replacing.

From your codes it sounds like your problem is in the fuel system.
P0171 is air-fuel ratio is lean, malfunction.
P0192 and P0194 is low pressure detected in fuel rail.
So you need to look for leak/s, fuel pressure, fuel regulator, and fuel filter. good luck.

Sounds like your dealer is feeling its way. which sensor did they say they changed and why. Do not pay for this ****, you took it to the dealer with a warning light and they say they changed something in order to attempt to cure the warning but they failed. About as much use as changing the seat covers and emptying the ash trays! When you say noise, is this a squeal, a crunch, is it continuous or is it during change gear. Does the car slip when in gear, is there vibration. Check your engine oil and transmission oil levels

You need to take it to an authorized dealer for OBD-reading and see what's wrong.

Most likely the catalytic converter temporary plugged and or the fresh air door jammed and allowed smell from the engine compartment came it. The catalytic converter can come loose and going around a turn it may plug it temporary and blow out the exhaust gaskets and cause the smell.

for p0171 it could be a few things like intake/exhaust leak,air system,map/vaf sensor,fuel presure/pump,injector(s),ho2s(heated oxygen sensor.