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.
Did You replace the EGR valve! Happened to me!
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.
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.
Looking at the engine from the front of the car, the EGR valve is directly behind the valve cover (right side). It has a wiring harness connected to it with multiple wires. It sits straight down on the engine and is attached with two bolts. ( Note: the front of the valve cover is next to the upper engine mount)