I got a code for 02 sensor I replaced up and down draft sensors. Check engine light went away for like 2 days and was running fine and then the check engin came back on with the same p171 code and running like crap again what gives

 

What kind of sensors did you use?

 

I used bosh

 

Is that OEM? Sometimes Chrysler products do not like aftermarket O2 sensors. Also check to make sure nothing came unplugged or melted agains the exhaust.

 

I've lost count how many times people have reported problems with Bosch sensors. It's not absolute though. Some have no problems. Why? Look in the Twilight Zone. I would stick with NGK or Denso.