Quote:
Originally Posted by mtaranov
I have error code P0455 on my Sentra 2006 1.8 SE. I replaced gas cap with genuin Nissan cap. I got the same code. I did smoke test at Firestone they did not find problrm and told that problem is in the cap. After they erased message I drove 300 miles without error light, but after I added gas to my tank I got this message again. In addition my milage is 3 -4 miles worse than it was before.
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You need a vent control valve. The part # is 14935-am60a. It costs around $100.00