In the description it shows
Defines the maximum allowed desired boost.
Now it is a value in Kilopascals. Stock on my LBZ was 270 which would be 39.1 PSI. By changin that to 300 (43.5PSI) Could this cause the engine light to come on with a P0299 "Turbo/Super Charger Engine Underboost"

The other day it came on but I had that set alot higher so I lowered it to see. Was OK for a day then today it came on. Could the computer be wanting more boost than it currently is tuned to make which caused the light??

Thanks a bunch!!