Question about 2001 Saturn L-Series

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I have a 2001 saturn L100 that has a code of PO404. Is this my EGR sensor? If so where is it located and can I clean it or does it have to be repaired?

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EGR Valve is on the intake manifold on the right side rear by the shock tower. It's round, has a base similar to a diamond shape, and has a steel tube leading up to it's base area on the back of the rear intake manifold. You can take it off and clean it out with throttle body cleaner, and clean the tube, but I've never seen one plugged. If it's indeed bad then I'd replace it and get a new gasket. If you're not sure how to check it then you should reask and clarify that.

BTW... just because there's a code doesn't mean the valve is broken. Could be an electrical issue. Again, check and clarify please.

Posted on Oct 08, 2009

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1 Answer

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1998 Cavalier 2.2L I'm pulling codes of PO404 and PO405 The First says EGR Flow CKT Range/Perf The second is a Circuit Low Input for EGR Sensor A. PO405 is a constant code while 404 came up only once, but...


In the top picture you can see egr adapter, three bolts, the egr valve mounts to adapter. Hope the picture gives you some orientation? You can see the 5 wire connector and wire colors. The bottom picture should be the egr valve.
egr 1-lkkjjxrk1tqhotv0eeqwlhlh-5-0.jpg

egr 2-lkkjjxrk1tqhotv0eeqwlhlh-5-2.jpg

egr 3-lkkjjxrk1tqhotv0eeqwlhlh-5-5.jpg

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1 Answer

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