service engine light turn on!

I have a Cavalier 95 VIN 4, A/C, Standard 2.2L

If I drive about 15 to 30 minutes and after I turn off and turn on my car (I hop 10 second to re-start), in 10 to 20 seconds appear in the panel "Check Engine", the scanner report that the problem is the EGR Valve, it was remplaced and the problem continue.

I can drive 1, 2, 3 or 5 hours and the Check Engine doesn´t appear.
If I hop 1 hour to turn on the car,the Check Engine doesn´t apper.

What is the possible problem?

Regards!
From Mexico City

This problem appear 2 years a go.

Does the check engine lightt come on when you start the car and then just go off or does it stay on?

Have you checked that you have all your fluids (oil, water, transmission, etc.)? I've had the lights come on for the water when the oil is the one that needs it, like it gets confused.

Recently the parking brake would come on while driving and stay on for a while when I don't have the parking brake on. I had it checked out and the ignition switch was bad! Go figure!

The check engine lightt come on when I start the car and always stay on, imagine that you start your car and drive for 30 minutes so you need to charge oil (turn off and turn on the car) and in 20 seconds aprox. the check engine lightt come on and stay on all the time, but if you park the car about 1 hour and turn on the car the check engine lightt does not on.

When you put the scanner it report fail in EGR Valve, but I replaced it and the problem continue.

I checked all fluids and there are ok.!


Regards, and apologize for my english

one thing about the scanner
when you replace a part....you also need to disconnected the negative battery terminal...then try tescanner....that resets the computer.