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Check Engine Code Help - P1457

Old 28-Dec-2004, 03:16 AM
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Check Engine Code Help - P1457

Can anyone help with a mystery check engine code I've got. I had it read and it's P1457 EVAP system leak. My ride is a 99 DX hatch. I tried swapping gas caps and that wasn't it. As well, Honda said that they tested the bypass selinoid, the 2 way selinoid, and the fuel tank pressior sensors. I've tried resetting the light and it keeps coming back on...I find mostly when I'm on the highway. Does anyone know what it might be?
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Old 04-Jan-2005, 01:01 PM
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This is not an easy code to diagnose. Even with the most experienced Honda/Acura technician working on it. Do you know if they did a function test and if it passed or not? Do you know if they checked the cannister vent shut valve? I would have looked there first on your vehicle.

The gas cap rarely throws a P1457, usually, if it was the cap, it would be a P1456. Well, all I can say is to take it to a dealer...

By the way, what is your mileage? Your car still might be covered under the emissions warranty.
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Old 09-Jan-2005, 08:08 PM
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Originally posted by MY SiR
This is not an easy code to diagnose. Even with the most experienced Honda/Acura technician working on it. Do you know if they did a function test and if it passed or not? Do you know if they checked the cannister vent shut valve? I would have looked there first on your vehicle.

The gas cap rarely throws a P1457, usually, if it was the cap, it would be a P1456. Well, all I can say is to take it to a dealer...

By the way, what is your mileage? Your car still might be covered under the emissions warranty.
Thanks for the help. Mileage is 72,000km's...they're giving me the run around about the warranty so I don't think it'll be covered. I believe they did a function test. They tested the selenoids and they all worked. How do I check the cannister vent shut valve?
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Old 12-Jan-2005, 07:39 PM
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I had an Acura come in to my shop last week with that code, ended up being the wiring under the rear seat. Water had leaked in and wires were corroded.
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Old 12-Jan-2005, 09:42 PM
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Hmm...it's funny you say that because I'm getting water in my trunk. I'll look under the rear seat to see if it's there too...could be the same thing. Why would this trip the fuel emissions system code?
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Old 15-Jan-2005, 05:14 PM
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The wire for the 2 way bypass valve comes up threw the floot under the seat. It could be corroded or shorting out
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Old 16-Jan-2005, 09:56 AM
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Originally posted by Draggintoy
The wire for the 2 way bypass valve comes up threw the floot under the seat. It could be corroded or shorting out
Cool, I'll check that out. Thanks for your help.
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