Need help locating the EGR valve on a 2001

Is the solenoid opening to provide vacuum to the egr valve? Does the egr valve open when vacuum is applied? There are some tests posted at the link below.
Repair Guides Components Systems Exhaust Gas Recirculation egr System...

Try this YouTube link. Its a 2001 but maybe similar. Egr replacement on 2001 mitsubishi eclips gt

EGR vacuum solenoid is located below your EGR valve. Center your self on the engine, look between the rear of the engine and your firewall. You can see your the top of you EGR valve, there will be a small vacuum hose connected to the top. Follow that small hose straight down from your EGR valve and it connects to the solenoid. You can see the solenoid better from beneath the car. May have an orange connector. Hope this helps.

The Exhaust Gas Recirculation (EGR) system is used to reduce Oxides of Nitrogen (NOx) in the engine exhaust. This is accomplished by allowing a predetermined amount of hot exhaust gas to recirculate and dilute the incoming air and fuel mixture. This process reduces peak flame temperature during combustion. The system uses a vacuum-controlled Exhaust Gas Recirculation (EGR) valve, in order to modulate exhaust gas flow from the exhaust manifold into the intake manifold.

i hope this helps you
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One simple thing to check, if you can find the Exhaust Gas Recycling (EGR) valve, With the engine cold see if you can move it . Be careful not to damage the diaphragm. If the EGR valve sticks you can easily lose 20% of your fuel economy. Depending on location it may easily come off for cleaning. Scrape out the soot and wash with carburetor cleaner . Do not lose the gaskets, they are metal and should easily go back in.

egr transducer solenoid,,located at underhood, beside a/c idle up solenoid control, take alook at the vaccum hose at egr valve, its goes through the egr solenoid treansducer valve, picture later

A code P0401 most likely means one or more of the following has happened:

•The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
•There is a blockage in the EGR (tube), most likely carbon buildup
•The EGR valve is faulty
•The EGR valve may not be opening due to a lack of vacuum

In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.

•Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticeable difference in RPM's with the EGR open
•Clean out the EGR valve and/or tubing to remove deposits
•Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
•Replace the DPFE sensor (with a good quality / OEM one)
•Replace the EGR valve

check ur egr valve -there are 3 parts to the egr --the dpfe[differential pressure feedback egr ]sensor//egr valve//actuator solenoid--++biggest problem with the egr valve is that it gets carboned up and the valve is stuck remove and clean the valve and tube with a carb cleaner and check valve for movement if faulty replace also check vacuum line and vacuum to egr unit

Check the code at advance auto parts, replace the PCV valve just in case. It is an inexpensive part, and if it is clogged will cause the engine to consume more fuel than normal. Also, check the EGR tube coming out of the EGR valve and going to the Intake Manifold. This clogs up with carbon, and is a very common problem that throws a code.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

P0403 Exhaust gas recirculation circuit malfunction.
The EGR valve is not happy.
This may require a new EGR valve.
I would try fuel injector cleaner first.
Put a full bottle in 1/3 tank of gas a give it a good run....could be a piece of carbon holding the valve out of position.
Does it idle ok?
A rougher than normal or faster than normal idle speed could be a stuck valve.