CEL came on for a day then went off, does that me a glitch in the sytem or
does it automatically go off after a time? I'm still going to clean the EGR but
it never did run badly when the cel came on.

A CEL will clear after a specified number of "cycles" of the system with the condition absent. Without knowing the code that caused your Rodeo to throw the CEL it is a crap-shoot as to what or even if there is a problem. As rodeo02 pointed out in your other thread, there are literally hudreds of OBD II codes that turn the CEL on, some are as minor as a loose gas cap or failed heater element in an O2 sensor, while otheres indicate serious problems (flashing CEL). So, while I wouldn't be worried about the light going out, I would try and be expedient about having the codes pulled if it comes on again. :2cents:

Can you tell me more about cleaning the EGR. My cel is on and the folks who read the code said the EGR needed to be replaced. I see several folks say they just clean it every once in a while.

Where is it located and how do you remove and clean?

Thanks