Another "Check Engine" question

[drice]

Check Engine light comes on the first time the engine returns to idle after reaching normal temperature. Sometimes goes off later in the day after multiple stops and starts. Can't make the stomp test work. O2 Sensor?
Thanks.
Dan Rice

[632 Regal]

umm....my best guess is intake gaskets. I needed to replace mine for a couple years and I get the code especially when it's real cold out or when I dont park in my heated garage :D