u/darkhorseharrison

Hey all,

I have a 2014 xf and i had the engine code p0420-00 come up a few weeks ago and took it to a mechanic, was told it could be the o2 sensors or ive gotten some bad fuel, hence the fuel crisis occurring right now. They cleared it and said to keep an eye on it, was fine for 2 weeks then popped back up again, got it looked at and its the same error code. I was doing city driving that day in comparison to my usual country side commutes, just wondering if it could be the o2 sensors faulty and if i should replace them?