This morning had my first CEL code p22fe ,no2 nox sensor. 148000 miles, I cleared the code keeping fingers crossed.
My logic on this is that if the CEL is lit for the NOx2, then the computer is smart enough not to throw the "poor DEF" warning, but if the computer thinks the NOx2 is working properly (i.e. you cleared the code) then it might think that the errant reading is legit and say "Oh, this NOx2 sensor says the exhaust is dirty, so I need to start the countdown to death"No Diesel, never had recall done. So just a CEL doesn't give count down to death that is a actual message then right. I now my semi it's a actual message and we always seem to have CEL lights and run for months with them lit, but when it's your car on the way to work I didn't know to clear it or let it go.