Join Date: Jan 2006
Car Year: 2004
Car Model: 2.5 XT
Feedback Score: 8 reviews
P1443 points to the valve on the canister at the rear of the car under the bumper (on passenger side). It could also be a loose gas cap, or even a rusted out fuel filler tube. It's most likely the valve if you're having actual issues after refueling, could be the wiring, valve, or even the hoses going to it being blocked.
Your rear O2 sensor is most likely bad, or the wiring is bad. Without a cat it should only give a p0420.
P0171 could be either the sensor itself or some sort of leak, could even be a dirty MAF sensor if your car has one.
The CPS code probably means the sensor needs to be replaced, but I'd pull it out and make sure its not just all gunked up.
04xt/4eat, 16g, STI bits and bobs