Hello all...

Still learning everyday more and more on EFI. I loaded a tune on a 2004 LB7 this weekend and after re-learn on the Allison, and some testing the truck ran absolutely awesome.

We parked it, and went to start it up for another cruise about 15 minutes later, and the SES light cam on with the following codes:

P2141 EGR Throttle Control Circulation Low
P2144 EGR Vent Control Circulation Low
P0489 EGR Control Circulation Low

I'm hoping I made an easy typo in a parameter, but i wanted to see if anyone had any ideas before too much more time was spent.

Any ideas??

Thanks