Long story short, I’m throwing a code that makes no sense to me. Prior to upgrades I was showing a max boost around 10, and I’m hitting 15 now. Everything I find about this code says boost leak, but running 50% higher boost consistently. The car feels like it’s running fine, tearing up the road really. Does this mean a small leak, enough to throw the code, but not so much to keep me down, like I should be hitting 18 or something?

 

Could be a small leak that shows itself at start up, but quite often a p1237 code has to do with the MAP sensor down near the thermostat.
Make sure it's connected properly, both Vacuum line and electrical connection.

 

Thanks for the advice. I was going to check any hose I could find this weekend. I’ll add the electrical connections to my list.