code is PO410. When the high pitched sound come on there is one click from under drivers side dash(like a switch sound) then stutter begins and fade away after 10 or 15 seconds. It repeats this until engine is warm-between 8 and 9 on gauge; then it runs smooth. This causes the CEL to come on. When I travel which is often, I can reset the light and jump on the interstate and drive hundreds of mile without the light coming on. But once the auto has cooled and I come to a stop light it begins again.

MBD