I had a P2000 code this morning. The code is no longer there. Also my oil change light came on 500 miles after having it change. It chimed once and the over head said See Dealer Service Required it had the oil change notification after it. Is that the normal message? I reset it figuring they forgot too and I have no warnings. The truck is running fine with no CEL and MPG has improved since the installation of the new turbo. I did drive this week without the exhaust brake on could it just be that soot is building up on the 02 sensor.

Thanks
Rex