One morning my truck wouldn’t start after 3 attempts. Took the wife’s car to work as it was a Saturday and she works at a school. I already told her it was the FPDM as the day before my truck randomly shook so bad I got out of it and popped the hood and saw the intake shaking; walked to the back of the truck and saw the exhaust shaking. Shut the truck off and started it again. Zero issues heading home at the time. No CEL thrown at all. Called my wife at work and asked if she’d lower the spare tire and check out the FPDM. She removed it and had a hard time doing so; it was corroded so bad that it split in half. After work, I got home and she was sitting on the back of the trucks tailgate waiting for me to go to Orielly’s and get the part she had called about. I went there and got it; it was a Dorman one with updated spacers. Got under the truck and installed it. I know she did all the hard work for me removing the old one. Truck fired up first attempt. Now, months later, I’ve tried everything I could think of to remove the “p1233” code that remains present in the vehicle. I’ve done a battery disconnect procedure with a jumper cable and let it sit for hours, hit the fuel pump reset switch off the passengers side fuse box (which is just about impossible to push down at any angle), and lastly checked all my fuses. I’ll disconnect the battery and drain all the power from the capacitors and I won’t throw the code with my reader but after one drive, the code will return. Any idea what I should do?

I was thinking that.

Yes, my wife is very mechanically inclined; you should see her with power tools! She is very intelligent and extremely handy. I’m glad I took the time this morning to post this thread. This seemed to be very interesting to me because I spent a solid amount of time out in the truck going over different variables about this code. Thanks for all your input.

Also my fuel mileage has seriously averaged to half its norm. I knew it was from the p1233 code. Perfect running truck. Phenomenal performance. Running lean! Definitely buying the Ford FPDM right now online. My fuses looked good. One thing though that’s bothering me... the relay. How do I know if it’s the relay? Swap relays out?