2016 Ford Focus p0420
Hello Scotty. I have a 2016 focus with 60k miles on it that keeps getting a p0420 code. I took it for a diag and after 2 days they told me it was one of the O2 sensors. I replaced it and the light keeps coming back on and off. Is the other sensor bad or is my cat converter really bad at 60k miles. Please note as well I just replaced the Evan purge control valve if that has anything to do with it.