Originally Posted by
PatrickGSR94
My wife and I drove her car around for nearly FIVE YEARS with the Check Engine light on during most of that time. I took it to AutoZone a few times to have them pull the code, and it was always the same thing - "EGR Insufficient Flow" which was really no big deal, maybe just a slight hit on fuel economy (no emissions testing 'round here). Finally, last year, I pulled the EGR valve off the cylinder head and found the metal pipe coming off the valve to be clogged up solid with carbon deposits. Took me almost an hour to get it cleaned out, but ever since then no more CEL and better fuel economy to boot!
If your light ever comes on again you can always stop by an auto parts store and they should hook up the scanner and tell you the code(s) stored, for free.
My mechanic just called. It's a cylinder temperature sensor that threw the code. The part is only $35 but it's 4+ hours of labor to get to it. He cleared the code and it's not coming back, so he's hoping it's a fluke. The part supplier doesn't have the sensor in stock anyway, so the mechanic told me not to worry about it unless the light comes back on. If it does then at that point he could order the part.