ATTS/engine light on

The ATTS and engine lights keep coming on in my 2001 prelude. Associated with these lights is a sputter while at idle. Have already replaced the O2 sensor and some other type of valve. Anyone have any experience with this problem?

When the lights are on that means there is a trouble code present. Find out what the codes are then you'll have a better idea of what to replace instead of guessing.