Question about 1998 Nissan Pathfinder

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I have a code P1447 Evap purge flow monitor on my 97 Pathfinder. What is and how do I correct this issue?

Posted by kwenu01 on


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P1447 - Evaporative Emission (EVAP) Control System, Purge Flow Monitor
In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions. Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP control system pressure sensor to intake manifold vacuum.

Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow are adequate. If not, a fault is determined. Malfunction is detected when EVAP control system does not operate properly, EVAP control system has a leak between intake manifold and EVAP control system pressure sensor.

- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes
* EVAP canister purge volume control solenoid valve stuck closed
* EVAP control system pressure sensor and the circuit
* Loose, disconnected or improper connection of rubber tube
* Blocked rubber tube
* Cracked EVAP canister
* EVAP canister purge volume control solenoid valve circuit
* Closed throttle position switch
* Blocked purge port
* Closed throttle position switch

Test is and send us your updated.

Posted on Jan 14, 2011



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My experience with my own 97 Pathfinder was that the EVAP canister internally ruptured, spreading charcoal pellets throughout connected portions of the vacuum system.

The tech replaced the EVAP canister and blew lines out with compressed air, but the P1447 code came back.

A few weeks later I had the tech check why the P1447 code came back, and he determined that the EVAP Canister Purge Volume Control Solenoid Valve had failed, as it did not pass certain resistance measurement tests. He replaced the valve, $288 + labor, blew a few remaining carbon bits out, and the problem seems to be fixed.

I kind of choked at the $288 price though, and took the part home. Two screws to pop it open. Turns out it was filled (surprise) with pulverized charcoal dust and would not operate.

The valve is a little rotating magnet that turns and screws a lipstick-style plunger up and down. I tapped out all the carbon and then started turning the bearings, which were crunchy sounding. However, the carbon eventually gave way to the bearings and they're spinning just fine now. I haven't tested the part, but from the simplicity of it, I have no doubt it would get me down the road many more miles.

Posted on Feb 02, 2011

  • nomecan Jan 17, 2012

    I got the same p1447 on my 97 pathfinder b/c my service engine light is on. the mechanic showed me the part and the charcoal pieces! I found a purge monitor for around $60 online. that sounds significantly cheaper so im wondering if another part goes with this?

  • Des Young
    Des Young Apr 25, 2015

    I took the little valve apart (can. pur.vcsv) and found it full, of carbon, cleaned it out and it now works. Had lots of carbon in the system so took the charcoal canister off and carefully sawed the top off. The canister has two compartments and are connected at the bottom. The carbon is small granules and over years had settled in the bottom of the canister( remember now the canister is on its side). the springs that push against the stainless steel plate had dropped down and cocked the plate. this allowed the carbon to get into the lines. I'm going to repack the canister and reverse the foam filters to use the good side then put a kitchen sponge that has the scotchbrite on it in there too so i'll be sure no more carbon will get out. I'm going to use activated carbon that goes into my fish tank filter. its the same stuff. then i'm going to RTV the outside seams and let it set up. I will also tie wrap the canister tight as the springs will want to push it apart. i have some pictures to add if i can.



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Related Questions:

1 Answer


This DTC checks for undesired intake vacuum flow to the EVAP system. The control module seals the EVAP system by commanding the EVAP canister purge solenoid valve OFF and the EVAP canister vent solenoid valve ON. The control module monitors the fuel tank pressure (FTP) sensor to determine if a vacuum is being drawn on the EVAP system

Read more at:
P0496 EVAP Flow During Non Purge Condition

Mar 02, 2017 | GMC Cars & Trucks

1 Answer

Where is the purge control valve located on 1998 nissian pathfinder

Location should be back by the fuel tank.

first off, the P1447 DTC is triggered when the EVAP control system isn't operating properly or there is a leak between the intake manifold and the pressure sensor. the parts between the pressure sensor and intake manifold are:

1. EVAP canister purge control solenoid valve
2. EVAP canister purge control valve
3. EVAP canister purge volume control valve (Part # 14930-3M201) YOU WILL HAVE TO DOUBLE CHECK ON THE PART NUMBER WITH THE DEALER FOR THE PRICE.

If you've received this P1447 DTC, chances are that the brick of charcoal in the canister has fallen apart over time, and filled the lines with charcoal. this affects parts 2 & 3 from the above list, and of course the EVAP canister (Part # 14950-1s717 $144.22). but when you replace the canister, you have to replace the EVAP canister vent control valve (part # 14935-54u06 about $100), and don't forget the o-ring (part # 16618-40u00 about $1.60) that goes between the canister and the vent control valve.

If you attack this DTC early enough, all you have to replace is the canister and vent control valve with the o-ring, which will add up to under $300 MSRP...a lot better than paying upwards of $1000 for parts and labor. Don't be scared to do it, it's actually quite simple.


Sep 28, 2015 | Cars & Trucks

1 Answer

What does code p1447 mean ...???

The code says "evap purge flow monitor fault"
Possible causes include ...
- EVAP canister purge volume control solenoid valve stuck closed.
- EVAP control system pressure sensor and its circuit.
- Loose, disconnected, or improper connection of rubber tube.
- Blocked rubber tube.
- Blocked or bent rubber tube to MAP/BARO switch solenoid valve.
- Cracked EVAP canister.
- EVAP canister purge volume control solenoid valve.
- Closed Throttle Position Switch.
- Improper connection of one-way valve.
- Blocked purge port.
- EVAP canister vent control valve.

This is a "jackpot" code. It points to so many possible causes as to be almost useless.

Feb 15, 2013 | 1996 Nissan Maxima

1 Answer

2004 BMW 325i I have a code p1447 do you know were to fix?

Fault codes do not have a single reason for being set, there are multiple reasons. here is the info you need to know about this code.
P1447 - Evaporative Emission Control System Purge Flow Monitor
Possible causes- EVAP canister purge volume control solenoid valve stuck closed
- EVAP control system pressure sensor and the circuit
- Loose, disconnected or improper connection of rubber tube
- Blocked rubber tube
- Cracked EVAP canister
- EVAP canister purge volume control solenoid valve circuit
- Closed throttle position switch
- Blocked purge port
- Closed throttle position switch

Jun 13, 2012 | Cars & Trucks

2 Answers

Common causes for codes p0441

getting code p441 could be caused by evap purge solenoid vacuum line loose leaking or restricted, evap purge solenoid faulty, evap purge vacuum line to canister leaking or disconnected,evap canister failed.

Feb 06, 2012 | 2001 Chrysler 300M

2 Answers

Check engine lite came on code is p1443 what does this code mean

P1443 Evaporative Emission Control System Control Valve The Evaporative Emission Control System monitors the fuel vapor flow between the engine intake manifold and the EVAP canister. The system failure occurs when a leak or blockage between the intake manifold, the EVAP canister purge valve and the EVAP canister is detected by the PCM.

Code P1443 Possible Causes:

- Pinched, blocked or plugged fuel vapor tubes/hoses (except between fuel tank and EVAP canister)

- Damaged EVAP canister

- Disconnected, cracked or cut fuel vapor tubes/hoses (except between fuel tank and EVAP canister)

- Damaged EVAP canister purge valve

May 04, 2011 | 1997 Ford Escort

1 Answer

I have a 1997 nissan pathfinder and had it trouble shoot. The computer read kout was P1447, which means that the EVAP perge flow monitor. i would like to know where to locate this on the vehicle so i could...

Hi. Thanks for your question. For any trobleshooting assistance regarding Nissan pathfinder you may visit and download the entire workshop manual which includes all the information along with the diagrams for better understanding. Good day!

Feb 25, 2018 | 1997 Nissan Pathfinder

2 Answers

P1444 Flujo de purga del circuito de entrada en q parte se encuentra localizada o localizado el senso r o patfinder 98 motor 3.3

I don't know any Spanish but here is the codes definition.

P1444 - Purge Flow Sensor Circuit Low Input

The EVAP canister purge volume control solenoid valve uses a ON/ OFF duty to control the flow rate of fuel vapor from the EVAP canister.The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.

  • EVAP control system pressure sensor
  • EVAP canister purge volume control solenoid valve (The valve is stuck open.)
  • EVAP canister vent control valve
  • EVAP canister
  • Hoses (Hoses are connected incorrectly or clogged.)
  • Feb 02, 2011 | 1998 Nissan Pathfinder

    1 Answer

    My 2005 neon failed emissions. It gave me a codes 0441. What excatly does that define?

    Trouble Code: P0441 (2.0L L4 VIN C Auto)
    EVAP Purge Flow Monitor Fault Print this code dataprint_icon_codes.gif Number of Trips to Set Code: 2
    OBD II Monitor Type: CCM Details
    Indicators: MIL Details
    Trouble Code Conditions:
    Engine at idle speed in closed loop for 200 seconds, BARO Sensor signal less than 8,000 feet, ECT Sensor more than 160ºF, no Low Fuel, MAP Sensor signal less than 23.7" Hg, and the PCM did not detect any purge flow through the EVAP system during this test.

    Possible Causes:
    • EVAP purge solenoid vacuum line loose, leaking or restricted
    • EVAP purge solenoid stuck leaking, stuck open or stuck closed
    • EVAP purge vacuum line to canister leaking or disconnected
    • EVAP canister leaking, damaged or has failed

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