Purge Valve Issue **UPDATE** - Second Generation Nissan Xterra Forums (2005+)
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post #1 of 15 (permalink) Old 04-20-2017, 07:41 AM Thread Starter
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Purge Valve Issue **UPDATE**

I just had a repair shop look into my check engine light. They said it was the purge valve. I told them to replace it. Some moneys and a few hours later I drive it home. Coming into work today and that stupid check engine light comes back on. I know it is the purge valve again just by the way it is idling. Is it worth it for me to try to even get this resolved? If the purge valve was replaced what else could it be?

***Update***
I had the code read and it is P0447. The system is stuck open. The valve is good. What would cause the system to stay open?

Last edited by cody0707; Today at 11:50 AM.
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post #2 of 15 (permalink) Old 04-20-2017, 09:08 AM
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Originally Posted by cody0707 View Post
I just had a repair shop look into my check engine light. They said it was the purge valve. I told them to replace it. Some moneys and a few hours later I drive it home. Coming into work today and that stupid check engine light comes back on. I know it is the purge valve again just by the way it is idling. Is it worth it for me to try to even get this resolved? If the purge valve was replaced what else could it be?
What is the fault code? You don't know anything until the code is pulled.
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post #3 of 15 (permalink) Old 04-20-2017, 09:11 AM
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. . . If the purge valve was replaced what else could it be?
A clogged evaporative charcoal canister - the plastic box the purge valve is attached to.



Often these can be "fixed" by blowing out the dust and crud inside with compressed air and running the vent tube to a place where it won't get clogged with dust again.

See these threads: http://www.thenewx.org/forum/15-how-...roblem-$5.html and Evap Can Vent Solenoid.

There is also a Nissan TSB on the subject: http://ww2.justanswer.com/uploads/ba...TB07-058a1.pdf

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post #4 of 15 (permalink) Old 04-20-2017, 09:57 AM
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^^what he said. The canister fills up with crud as does the valve itself.

During 99% of your driving the purge valve is open, allowing pressure exchange with the atmosphere and the gas tank. The charcoal filter prevents harmful VOCs from escaping.

During a drive cycle, the system closes the purge valve and pressurises the system. If the valve is gummed up and won't close it won't build pressure. On the contrary, if the filter is gummed up, the system will build pressure when it isn't supposed to. Both situations will throw the same code


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post #5 of 15 (permalink) Old 04-20-2017, 10:05 AM Thread Starter
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Thanks for the help. I'll drop the canister tonight and spray the crap out of it. Kicking myself for not just fixing it myself. The auto shop that I trust must have skipped that step.
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post #6 of 15 (permalink) Old 04-20-2017, 10:25 AM
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Thanks for the help. I'll drop the canister tonight and spray the crap out of it. Kicking myself for not just fixing it myself. The auto shop that I trust must have skipped that step.
Mine threw a code when I was still under warranty. Rather than having them band aid it i cleaned it myself and added the breather. Been code free ever since

Fix it the right way


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post #7 of 15 (permalink) Old 04-22-2017, 02:23 PM
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Originally Posted by cody0707 View Post
I just had a repair shop look into my check engine light. They said it was the purge valve. I told them to replace it. Some moneys and a few hours later I drive it home. Coming into work today and that stupid check engine light comes back on. I know it is the purge valve again just by the way it is idling. Is it worth it for me to try to even get this resolved? If the purge valve was replaced what else could it be?


It's your can bro. I put a valve in mine same issue few miles later light came on. God a new can and I'm good now. Drop your spare tire its right there. 10mm bolt. And two lines.


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post #8 of 15 (permalink) Old Today, 11:45 AM Thread Starter
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I had the auto parts store run the code. The code that came back is P0447. So my system is reading that it is stuck open. What could cause the system to stay open?

My simple fix was a piece of electrical tape covering the check engine light. I would still like to fix the issue though.
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post #9 of 15 (permalink) Old Today, 12:05 PM
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Read this:


How-to: Solve Evap Canister Problem for $5

Get a new solenoid and do this:

Evap Can Vent Solenoid


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post #10 of 15 (permalink) Old Today, 12:11 PM
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What year and miles? My was bad and spitting out gas when I tried to fuel it. Was covered under warranty as it's a known emission related problem

If you're "Feeling the Bern", I'd get checked out for STD's.
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