mpringle

Not sure how many miles, probably about 200?

I have a 1996 es300 that has a code # 402 = Excessive EGR Flow. I had the EGR valve replaced by a Lexus mechanic, however after a few weeks, the check engine light came back on with the same code. I'm not mechanically inclined, but I can do basic work on my car. What can I do to troubleshoot this issue? What might be the problem? Thanks ahead of time.