I am sure there is a post or two with this question, but my search option is not working.
A few months back I noticed I was getting a CEL
when I was towing. At first I thought it was the gas cap. When I made it to my destination I would reset my cap and after the towing was complete (same day) and I was back to normal driving the light would go out. So naturally I thought the drive cycles were met.
I began noticing it every time I towed, but would clear before I had a chance to get the code downloaded. I decided to run it in tow mode everyday and all day without towing anything. With the idea of once the CEL
I could swing into checkers. After a week it finally flagged and I made it to checkers and they pulled the p0401.
What is the possibilities?
A little info on My truck; 2004 F350 4door long bed 2wd. The only mods are muffler deleted, bulletproof EGR
cooler and intake. There is 175k on the dial.
Thank you in advance for any info.