I had an issue last year with the F350 in my signature where the SES engine light would come on after starting when cold and would go off by the time I hit the end of the block...no other issues. So this year it's doing the same thing again except a few issues. First, it's not starting like it typically does when not at normal operating temperature...in other words, it takes longer to start and doesn't start with an explosion...if that makes sense. If I drive it to the hardware store it starts like it should when I get in for the drive back home and no SES light comes on. So now after the SES light goes off after I make the end of the block I notice the idle is higher when I come to a stop light...like maybe 850 rpms or so. Once the truck is all warmed up, this goes away. So I checked the codes today with the truck cold and I get P0470, P0603, and P1280. I realize the P0603 is from the chip. I did recently clean the exhaust back pressure sensor...EBP...and ran some hard wire down the tube.

After reading some threads I was thinking it might be the engine oil temperature sensor...EOT...but now not so sure. To me it is leaning more towards the EBP sensor.