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Anybody know if there is any preventative maintenance for this valve because if it is clogged, the CEL will be on. Thanks .

2004 -I4-AT- 110k-
 

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There are EGR cleaning kits that bolt in place of the valve and a cleaner is run through it. It's worthless if the port is already clogged. I have yet to try it on my car.
 

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On both engines, you can just remove the plate on the intake and clean the ports.
 
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