greenskeeper
Full Access Member
What's the box code? And yes I do.
box code is on the PCM label that has the ford part number you referenced.
If you are getting a "check engine light" when first turning the key to "on" that means your PCM is powering up.
Does the CEL stay on?
If so there are codes stored that may tell what is wrong with your truck.
If the CEL goes out, then your PCM is fine and it may be a wiring or sensor problem
FWIW I've never heard of an OBS pcm going bad aside from "modification"