Where is the EGR valve located

EGR or DPFE is located on right side of intake manifold. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Egr vavle is mounted on the intake manifold, if it is going bad you will probably have trouble codes, and you will have rough idle, rough acceleration, bad performance.

EGR= Exhaust gas recirculation system, recovers unburned vapors for re-burning in the engine. Will not pass your next state inspection and could lead to more trouble if not fixed.
Here's what to do:
Pull the egr off, clean the port under it all the way to the throttle plate, I use a length of steel coathanger. Put it all back together, reset the codes, if light comes on again, replace the EGR position sensor, thats the one the two small hoses from the exhaust plug into! First make sure the EGR itself holds vacuum! If the valve dont move, it will also set P0401!

What can happen is engine hesitation, also the carbon will start to fill in the intake manifold, then you need to remove that and clean out the carbon, Also if too much unburned gas collects in the catalytic converters, they will be damaged. this is a 10 minute fix, Go to the local parts supply house, buy a new EGR gasket before you do it, if the EGR opens and closes and the diaphram holds air, do what I said...EGR is on top of the motor toward the passenger side, look at the back exhaust manifold, you will see a flex tube thats about an inch in diameter, loosen the large nut on the EGR then the 100 mm bolts, pull EGR off, clean both the EGR pintle, and the port, and re assemble. DONE!

Under the EGR is a port that runs right down to the throttle plate, ream it out with the coat hangar, then spray throttle body cleaner thru it, clean throttle plate, and EGR. Make sure EGR holds vacuum! Then reassemble, clear the code, if the code resets, and you are sure the port is clear under the EGR, Replace the EGR position sensor, not the EGR!

What code did you have? 401? I find in most all situations that the problem is not the valve at all, it is the sensor that detects exhaust pressure that fails. This is call the dpfe sensor and is very simple to install, unscrew 2 eight mm bolts unhook 2 vacuum lines then install new part. Hope this helps

You seem to NOT be reading my answer thoroughly. SEE IF TH EGR holds vacuum, clean only the blacked PINTLE with soapy water, or TBI spray cleaner. Do this and see what happens. The sensor occasionally MELTS with the heat. Follow the two small tubes from that flex tube to the sensor, BE VERY gentle removing the rubber tubes, they break easily.

I was reading your mind. Purchase the new sensor first it cost about 30 -40 bucks, then look at engine and try to match it up, this should be fairly easy. Look for 2 gray rubber hoses they will connect to it, there are only 2 gray hoses under the hood so this makes it even easier and you will be surprised how easy it is to replace.

Hi:
the hose is providing vacuum to the EGR. When the engine is running, remove the hose and see if there is pressure coming from the EGR. There shouldn't be. If there is, replace it. Also, to answer your question about the hose, yes it can cause a poor idle. Take the hose off and take it to the local parts store and get a new one and replace it.

Let me know what you find.

Joe

Let's start the exact code number, rather than description for the check engine light. All of them if you have more than one. Also please post the first 8 digits of your VIN. I need to know the actual engine you have to provide accurate info.