So my check engine light came on the other day and stayed on for 3 days, it went off on its own just before my buddy read the codes (literally 2 minutes before). He checked the computer anyway and there were 2 codes there, P1247 and P1248. I checked them on here and the 1247 is low turbo boost and the 1248 is no turbo boost detected, but like I said the check engine light went out on its own and the truck seems to be running totally fine! Should I be worried?

What does it mean???

 

Clear the codes and see if they come back. Did you notice anything different about the way that the truck ran while the SES light was on?

 

Make sure the electrical connection on the MAP sensor is okay. When I put in the OverBoost Annihilator, I left the plug disconnected and got that code. Might also check to see if the line came loose from the spider...

Look for the line in your truck I have a tee in -- that the MAP sensor line (disregard the arrow pointing to the HPX).


EDIT: Here's another angle, shows where the line connects to the spider:

 

thanks guys
I checked the connections this morning and everything seemed good.
Could the cold have anything to do with this, as it was probably -20 at the time?

I have to talk to my buddy to see if the codes have reappeared or not.

 

Sure it could. You might have issues with the EBPV/EBPS. Could have some gelling going on with the fuel, or both. Keep an eye on things especially when it's cold, and use anti-gel fuel treatment.

 

Will do Joe.
I'll keep you posted if anything changes.
thanks