Should be towards the back side of the motor on the drivers side. You should see the round pancake lookeing top on it. Dont forget if you take it off - to REPLACE the gasket, and get the old one completely off.
You clean or replace it.
The only hard part is the EGR valve assembly. The head on the newer Saturn is slightly different, making it necessary to find a work-around for the EGR valve.
Did You replace the EGR valve! Happened to me!
On the back of the head, just above the transmission bell housing,
There is no pressure sensor. The EGR valve is located on the head next to the battery. Cleaning it is usuallu the first step if there are any SES codes associated with the valve.
25-35 bucks
I'd start with the basics; see if there is a fuel leak.
The PVC valve is not held in by any nuts or bolts. Just pull on it to remove it.
The EGR Valve is located on top of the intake manifold. If you are standing in front of the car it would be on your right hand side. It is cylinder in shape and has wire harness that connects to the back of the engine!
Check out sunbelt valve body builders they specialize in saturns. Their number is 813615560 or at sunbeltvalvebody.com
Depending on the year, the EGR valve is easily removed by removing the electrical connector and the bolts. Looking down at the engine from in front of the vehicle, the EGR valve is connected to the right side of the head, just above the transmission bell housing.
EGR valve is located on the top of the motor, just to the right of your valve cover, in between the valve cover and the air intake tube. it has a 4-wire connector going to it. Besides the wire harness, the valve is held in by two 10mm bolts.