I have a 1999 F-150 and for the first time I failed emissions. I then brought the truck home and began replacing the problems according to the error codes; I replaced the CO2 sensors, I replaced the evaporator canister along with the valves both front and back. I still have an emissions light on. I had the light reset to see if that was the problem but each time it comes back on. What could I be missing or could I do to fix this issue and pass emissions?
I would really appreciate some help with this one. Thanks and Best wishes for the new year.