Now :wtf1:. Having problem with truck getting P0234 "overboost" code while driving at freeway speeds. Code came up with only 6lbs boost. Has anyone else had this problem? This happens all the time when programmer is on any setting but stock.
I did see this PPE boost valve but didn't want to increase boost untill problem is fixed, however i just placed order for one. I'll give it a try. I have the Banks "Big head waste gate" that probaly does the same thing. I had it on this truck about 2 years ago but took it off because of this "overboost code" condition. I couldn't seem to get it dialed in corectly.
A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more!