Have a 2018 crew cab XLT 4x4 w/ 3.5L ecoboost. Codes P0018, and P0021 Starting to show up more frequently, but not permanent, codes appeared 2 times in 5 hrs of driving, I keep erasing to see if they come right back. I know its progressing, so I hardly been driving it. I noticed when I drive it theres a brief (rattle) after I let off of the gas pedal, im preparing myself for the repair, I have my reservations about the Dealership, because of mechanic high turnover rates, I know an independent shop that seems to know the problem well, any recommendations on who is great at this, in maryland or within 80 miles of Silver Spring, MD?

 

Dammit , this afternoon, it happend. Loss power, ( limp mode ) shuttering and flashing CEL , I limped it home ( bout 2 miles ) then parked it. HELP