code P1456 very small leak
#3
Also check under your fuel cap. If the filler neck opening is all rusty, that will throw the code too. Mine did and I cleaned up the neck with Scotch Brite and the code hasn't come back in almost a year now.
#4
id hate to bring an old thread back from the dead but i am going through the same code/problem. I did what people said and cleaned the fuel neck with scotch brite. and put the old gas cap back on. And i even tried a new gas cap. But how long is it going to take for the cel to clear itself or do i have to delete/erase it myself get back to me thanks
Jeff H
Jeff H
#12
One of the possibilities listed in the FSM is the EVAP canister vent control valve. On the 4th gens, the EVAP canister vent control valve is becomming a problem as the cars age. This valve is by the canister and has a plunger inside it that will stick and not move as it should. You can open up this valve and clean/lubricate it.
#13
I've gotten this 3 times since owning my max. The first time, I reseated the gas cap and it went away within 30 miles. The second time I replaced the gas cap because the mechanism in the cap that keeps you from overtightening woas slipping and not allowing me to tighten it. I purchased an aftermarket cap from Autozone and had the same problem from the start. I ended up picking one up at nissan, problem has been gone for 3 years.
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