Actually I've used all three situations. I have the boost gauge and see when the sensor trips. 2 lbs of boost. I borrowed a scan gauge and when the sensor trips and see theres no boost I then look at the scan gauge. yep, a p0328 shows up. You can clear it then but it won't reset untill the engine is stopped and restarted. Also, like I said. take off with a tripped sensor with the a/c on. The truck struggles.

The sensor is extremely tempermental. Got all the way into work this morning and the sensor didnt trip.