Hello Scotty, I played the devil's advocated and bought a 2018 Ford f150 2.7 EB new off the lot. Now it has 113,000 miles, and I have a CEL with P0420 and P0430 codes but no issues driving or smoking. Went to several shops with varying opinions. I have recently switched to a different gas station and did an Italian tune up. The first time I did this, my CEL went away for two days, second time around, I switched to premium fuel and did the Italian tune up once more, the CEL went out for three days. What could be the issue and is what I am doing helping? P.S. My mom's 2013 Honda Odyssey with 184,000 miles has the same problem and I am getting the same result. Thanks in advance!