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Forums > > 97 pathfinder SES w/ P1447.
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  #1  
Old 07-24-2010, 04:28 PM
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Default 97 pathfinder SES w/ P1447.

Hello Everybody,
I have a 97 pathy with 120k miles. SES light has come on recently. P1447. Cleared fault. Fault returns after readiness is set. Although I turn a wrench for a living, am not at all familiar with Nissans. I stumbled across this website looking for service information. Found all the info related to this fault code including the evap sys. cleaning procedure and flow charts. Inspected evap canister and lines. found no obvious damage. water separator is cracked on the bottom, not near the lines or case. Have not pulled anything apart yet. There seem to be multiple sensors and solenoids in this system. Just looking for a general opinion before i go crazy with this. Any thoughts/past experience with this fault would be greatly appreciated. Need to get rid of ses light to pass state inspection.
Thanks
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  #2  
Old 08-15-2010, 04:52 PM
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pyrophilus pyrophilus is offline
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I've had this problem on ALL of my pathfinders.

On my '97SE (VG33E) it was P1447
I forget the fault code on my '01LE (VQ35DE)
On my '05LE (VQ40DE) it was P0455

They ALL are for EVAP canister purge valve solonoid.

The valve has two ports, and one wiring harness plug with two connectors.
It is located off the EVAP canister. In all models of the pathfinders, it is located under the driver's side rear fender.

The '97 an '01 are easy to find. I think the evap valve is actually visible from when you lie down under the vehicle. The plastic tube that comes out is VERY BRITTLE. I broke them off trying to pry off the rubber hose. The hose was pretty beat up too.

I remember I got the solenoid valve from Courtesyparts.com for not too much, and I went to autozone and got few lengths of reinforced rubber fuel hose (it looked exactly the same as the beat up one on my pathfinder).

Anyway, the solenoid in the '97 and '01 valve cannot be seen (internal), but you can check for operation by applying 12VDC to the two leads. Once you pull out the valve, run 12vdc to it, then you should hear a "click" you should be able to blow into the valve when it is open, and you shouldn't be able to when it closes (forget when it opens closes, with current on or off, but you get my point).

Most likely, the valve is seized. Mine made the "click" but it was stuck open.

I JUST did this on my '05 LE two days ago, it was PITA, beacuse they actualy put the EVAP up the rear fender, and the valve is on TOP of the canister, but the valve only cost me $45 on amazon.

Once the valve is replaced, you drive around 2-3 times, the light should go off all on its own.

BTW, the '97 and '01 EVAP purge valves are actually mounted to the frame, near the EVAP, with two rubber tuves running to it. One tube runs to EVAp and one tube runs somewhere else.
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  #3  
Old 08-16-2010, 06:25 AM
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Hey pyrophilus,
Thanks for the info. I removed the line from the purge solenoid valve under the hood out of curiosity. found it FULL of charcoal. Took several hours to clear the purge line completely. I was able to find the evap canister with the solenoid attached for $75 from a junkyard. Reset the battery and have put about 100 miles on the odometer since. so far so good. hopefully the ses light stays off!
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Old 08-18-2010, 03:38 PM
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Quote:
Originally Posted by miniec400 View Post
Hey pyrophilus,
Thanks for the info. I removed the line from the purge solenoid valve under the hood out of curiosity. found it FULL of charcoal. Took several hours to clear the purge line completely. I was able to find the evap canister with the solenoid attached for $75 from a junkyard. Reset the battery and have put about 100 miles on the odometer since. so far so good. hopefully the ses light stays off!
You're welcome. Glad that i was able to help,

Don't know how much truth there is, but I read from somewhere that topping off the gas contributes to EVAP malfunction.

I am guessing that the source of the charcoal is the EVAP canister? if so, then wow, that's all the way from driver's rear fender to under the hood...?!?!?
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Old 05-19-2017, 10:12 AM
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Default I'm at a loss here....

Sorry to resurrect the thread, but I have the exact same issue as seen above; when my evap monitor clears as ready I get the error code p1447 on my '97 pathy.

Are we talking about the vent valve directly attached to the canister? There's the pressure or boost sensor and the vacuum cut/ bypass valves that I'm aware of. Is there another valve I'm missing? I would truly appreciate any help here.
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  #6  
Old 05-21-2017, 04:34 PM
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There are a whole lot of valves and solenoids in the system. The vent control valve is attached to the canister and the most common malfunction, however, if the liner inside the canister has failed and bits of charcoal have been sucked through the system, all of the components and lines need to be blown clear. The vent control valve is used to close the system for vacuum testing by the ECM. The purge valve is used to apply vacuum from the intake system to the evap system for testing and to pull the gas fumes from the canister to the engine so they can be burned in the combustion process. The evap pressure sensor is the "eyes" of the system for the ECM. Then, as mentioned are the vacuum cut valve and vacuum cut valve bypass valve and a solenoid, also used to aid in testing. P1447 is a purge flow monitor failure detected by the ECM. You can find more info at the link below. For diagnostics, you will need a factory service manual and vacuum/pressure pump with an adapter for the EVAP system test port. A scan tool makes the job a lot easier, as well, as does a smoke machine.


Read more: https://www.autocodes.com/p1447.html
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  #7  
Old 05-22-2017, 08:21 PM
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Thank you.
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