Quote:
Originally Posted by hoangtienvo
just went to auto zone and nissan dealer. code P0456. but auto zone gave me report can be gas cap or EVAP vent control Valve. anyone have ideas how i can check vent control valve.
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I did a little more forum searching - the FI exhaust (and all the HKS style exhausts) require the removal of the EVAP heat shield by the muffler. Check that area to make sure everything is still hooked up properly.
This seems like the only logical place where you could touch something that ends up throwing that code.