upflying
Junior Member
While sitting completely stopped and idling for one hour on an incline on Interstate 80, a check engine light popped on. After I got home, I pulled the codes and discovered P203F is low DEF and P0128 is engine operating cooler than it should. Dealer wants $180 plus labor and parts to diagnose this. Could idling for one hour in cold weather cause the cold engine code? Could the incline I was stopped on cause the low def code? Def tank gauge shows about 1/3 remaining. I'm ready to clear the codes myself an tell the dealer to screw it.
My truck is a 2018 CTD, crew cab, shortbed...29,000 miles.
My truck is a 2018 CTD, crew cab, shortbed...29,000 miles.