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I have an 2006 Hyundai Sonata and it failed inspection for a window sticker. The code is P0452 and do not know what it means. Can someone tell me what needs to be fixed and what is the error code meaning?
 

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It means the engine computer doesn't like the signal it's getting from the fuel tank pressure sensor. There are a few possible reasons why the signal could be wrong. You'll need to have the fault diagnosed to figure it out.
 
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