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Old 08-05-2017, 08:21 AM
Connie Connie is offline
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Location: Ontario, Canada
Posts: 257
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Connie is somewhat reliable
Re: P01456 Code Evap.

Originally Posted by Rusty Accord View Post
The PO1456 code covers quite a few things. Honda says replace the gas cap first. Then it goes on to checking the fuel tank, fuel filler line and vent line, then it moves on to other parts of the fuel system (under the car). I didn't have a code 1456, but I did have a fuel tank leak (mine was in 3 places on the rear tank seam, and would make a big puddle of fuel on the ground, and the car stunk of fuel.
Most times, it's the cap though. Keep in mind that a rusty fuel tank won't throw a PO1456 code. But, those of us in the northern climates are used to rust, and we know what it effects.
I had the code for 3 years on Connie.

I noticed no difference after fixing it, aside from not having a CEL, and I drive Connie a LOT. I only changed the tank because it was becoming quite the leak and I needed to get some exhaust work involving welding done.

If you need to pass emissions, you still can without fixing anything; when you reset the code by unhooking the battery, it takes about 1/3 of a tank of gas for it to come back on. Your monitor for "evaporative emissions system" will scan as "not ready". You are allowed one "not ready" here in Ontario; as long as everything else comes back "ready", your overall result will still be a pass.
2002 Accord V6 Coupe, "Connie", 516,000km
2000 Accord V6 Coupe, "Midnight", 209,000km
2000 Accord V6 Coupe, 412,000km; 1998 Accord V6 Coupe, 266,000km; 1998 Accord V6 Sedan, 278,000km
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