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Clean it or replace it.
Answer by Tigercadd:
The 4 cylinder engine has no EGR valve and the V-6 rarely fails. If you're getting an EGR flow overspeed or underspeed code, you simply need to clean the EGR passages at the back of your throttle body. You can have a shop do it for $100 or simply get a TB gasket and do it yourself. Once you remove the TB and gasket you will understand what to do. Put a sheet of common aluminum foil under the TB to catch all the chunky crud. You don't need that dropping onto your transmission case.
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