My 06 Buick LaCrosse 3.8L has a check engine light that says that the MAP has a low voltage, so I checked the air filter. It was clean, then I changed out the MAP and the check engine light went off the next day and then the lcd screen said check gas cap even though the gas cap and the seal on it was tight and secure...
But one day later the MAP came back up saying low voltage, any ideas.
This MAP sits right on top of the PCV, the PCV was clear. I could blow through it, are these two things closely related, I mean where and why am I getting a low voltage if the flow is clear