Evap Code - Nissan Frontier Forum
 
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#1 (permalink) Old 05-09-2011, 07:26 AM
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Evap Code

Code seems to stay away as long as the tank is full thru the filler neck. What do you guys think?
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#2 (permalink) Old 05-09-2011, 07:34 AM
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I'm not sure, mine is as random as it can be. I've tried to follow it for two years and figure out what sets it off. It can come on 3 times in one day, but I've gone months without it also. Very rare to see it on mine during the winter at all.
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#3 (permalink) Old 05-09-2011, 07:15 PM
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Gotem' both now!

Both of my Evap Codes ARE! P1456 and a 0442! Please chime and there ya go!
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#4 (permalink) Old 05-09-2011, 08:15 PM
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Take a look on the driveshaft side of your gas tank for a fuel stain. Could be a leaking sending unit O ring.

Run it 'till it breaks and fix it faster!
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#5 (permalink) Old 05-11-2011, 07:03 AM
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Originally Posted by nutsandboldts05 View Post
I'm not sure, mine is as random as it can be. I've tried to follow it for two years and figure out what sets it off. It can come on 3 times in one day, but I've gone months without it also. Very rare to see it on mine during the winter at all.
Mine's the same - rarely in the winter (0442)

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#6 (permalink) Old 05-25-2011, 12:20 PM
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Both of my Evap Codes ARE! P1456 and a 0442! Please chime and there ya go!
I fought with both of these codes for a long while before I got it sorted out. First tried a new OEM gas cap with fingers crossed and that didn't help.

Read about a recall for the fuel sending unit due to corrosion. I bought hte truck used, looked it up and it hadn't been done yet so got that done - they did a new gas tank along with it. That got rid of the P0442 for the most part, but it did return from time to time although few and far between.

All the lines under the truck seemed good and the canister was replaced recently by the previous owner so I knew that wasn't it.

Got to under the hood and found some sketcky connections on the evap lines on a valve located on the driver's side fender.

Replaced the lines and the P0442 was gone for good, P1456 would return only after the truck had warmed up ona longer drive. I knew I was getting closer...

Re-examined the valve itself on the vender and one of the connection nipples appeared to have a hairline crack in it. Replaced the valve itself and both codes are gone.

For me it was a combination of gas tank (was rusted on the top near one of the nipples and had a pin-hole leak) and the evap valve on the driver's fender.

'03 Fronty S/C CC 4x4 LB
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#7 (permalink) Old 05-25-2011, 05:34 PM
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Wtf!

Anyone know the quickest way to get to the light bulb under the Service Engine light!? Jeez! My A$$!
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