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Hi all, I have a CEL light on, checked with OBD2 and I'm getting error 0456, which indicates small emissions leak. I've looked briefly and cannot locate any leaks under the hood. I've checked the gas cap is tightend and I've replaced the air intake filter as possible causes. In researching this error code it looks like the PCV is at fault in alot of cases. Can someone in the know tell me where I can find this on my 2011 Compass. the replacement seems straightforward, I just gotta locate the sucker. Thanks.
 

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rock auto show the pcv valve it screws in some were, try the valve cover
 
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