I stays on while the air conditioning is on. And the hi and low turn on for about the same time I think. Maybe not exact but pretty close. I have no drivability issues with this. Runs perfect. Just this annoying light after changing the header gaskets. Only electrical I touched was unplugging the battery and removing the oxygen sensors. Didn't unplug them, just removed them from the X pipe. After that, I'm now getting these codes. And everything is connected. I verified all of that several times just in case I did miss something.
All of that was done a year ago with quality components. All except the PVC valve. It had a new IAC valve cause I was having idling issues while the ac was on. Car would want to die when the ac was on. But this was all done before I did the gaskets with no issues. Didn't have a cel until I swapped out the gaskets.