P2653 code

throwing that tonight. i read it on my DD and i realize its the low boost circuit code or something of that nature.. anyways it acts like the vanes are open, or sounds like. took it for a hard drive and it builds normal boost, egts in check, and backpressure is normal... threw a CEL once for the code. any idea why, and how i might go about fixing?

My guess is that your EBP sensor is on it's way out or your VGT actuator is going out. It could also be the MAP sensor, but that is less likely given that the exhaust note is changed.

thats nice :doh: always something.. we'll see what happens. any other ideas people?

I know with the DashDAQ, you can figure out which sensor is bad by monitoring MAP, EBP, and barometric pressure together with the key on and engine off. It's possible because the DashDAQ reads with barometric pressure added in. I don't think the H&S units do. If you know anyone with a DashDAQ, might want to give that a try. They all need to be relatively close. If one (MAP or EBP) is different from the others, that sensor is bad. If they all check out, it's more than likely something else.....like the VGT actuator.

I have a dashdaq for my monitor I'll try that.

acts like its the little plastic gears in the VGT actuator that may be slipping. like you kinda said Jeff