The passages for the Exhaust Gas Recirculation (EGR) system can become restricted or clogged causing the Check Engine Light to illuminate. The EGR valve will need to be inspected and the passages cleaned.Google+
Car Problem Reports
Mazda 626 Check Engine Light Due to Restricted EGR System
Mazda 626 Problem
Average Mileage: 119,316 mi (106,000 mi - 136,000 mi)
Visitor, 1999 Mazda 626, 123,000 mi
Check Engine light would come on and then, after a short time, go back off. The code indicated EGR Valve. Had valve checked and cleaned, hasn't come back on in 7,000 miles.
cant afford to have this fixed, it has been on for some time now> Has there been a recall on it? Mazda 626 6cyl 2.5 liter engine?
Visitor, 2000 Mazda 626, 111,600 mi
Engine light came on and finally stayed on. I was told by a mechanic that it was my EGR valve and that it was a sealed unit and couldn't be cleaned. I would have to have new one installed for $800! I am so glad that I was able to find this site.
Visitor, 1997 Mazda 626, 106,000 mi
I noticed the light and asked my mechanic to check it out. He is an ASE NAPA mechanic. He cleaned the EGR system and the light extinguished. No charge for the repair.