My 97 camry had the check engine light on a month ago. I found out that the problem is EGR circulation flow problem. From what I have read in the forum, many recommends that I clean the EGR valve first. I called more than 4 independent dealers, but all of them said they don't clean EGR. It is better for me to have them dignose the problem first.

I am so confused and wondering if anyone have any idea what I should do?

Thank you very much

Clean the EGR valve. They are just trying to get you in the door.

Take it off and clean it with solvent as best you can.

Can just as often be the tube supplying exhaust gas to the EGR valve that needs cleaning.
Been a long time since I've had to do that, but that's where I've seen blockages.