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Just another thought, if it were weak batteries, it shouldn't kick a constant code while running, especially above 1200 rpm and the alternator still reads between 13 and 14 VDC I think, didn't notice a low voltage scrolling through the dash.

The GT Tuner is a piggyback that plugs into the OBD2. I did run it for quite some time with it disconnected. Batteries are fairly new, within the last 2 years, but I will hit them with a load tester this weekend. Factory batteries didn't last long at all!

I didn't try the calibration, It requires the precal first, and the actuator has to be removed for that. Due to lack of time and space in the garage I couldn't get to it this weekend. I will be back at it next weekend when I get home!

If it was a dealership or shady place, maybe. And I'm not saying we didn't knock something loose

So far I have found nothing around the dash that would affect the turbo or actuator. The only link between the 2 I have found so far is the batteries being disconnected. I have seen numerous reports in various forums stating weak or disconnected batteries have not created the problem...

Updated Signature, filled out the truck profile but didn't realize that doesn't show. 17 Big Horn 4x4 Quad Cab, Monster intake, Heater and CAI. Bully Dog GT Tuner Boost is low, 1-2 psi until I get into higher rpms even under a load and then only 21psi . Absolutely no exhaust brake. Batteries are...

Just got the truck back from having the Blend Doors, actuators, Heater Core and Evaporator replaced (2 blend doors broken but replaced everything since getting the air box out is such a PITA). Truck had been sitting for a week with the batteries disconnected while the work was being done...