It could also be a P1211 code with is ICP pressure above or below desired. They will come on with a chip. And will go off but it takes a little while usually.
Thats the one i was thinkin of, i just couldnt think of it at the time.... if i had to guess, i would guess this one, but till i can get a good enough scanner, dont know
isnt there a plug in "fooler" that will stop this code from happenin?