Today as I was getting off an on ramp to the highway I tried to accelerate and had no power. Check engine light came on so I pulled over to a safe spot and had onstar run diagnostics. Came back with code P0299. Restarted the car and it seems to accelerate fine if not putting a lot of demand on it, but if I try to get speed quickly I lose power quickly. I googled the code and it seems it’s a underpower boost issue. Anyone know how I can easily check / test what’s going on? Thanks in advance for all the help.