Question about 2001 Pontiac Montana

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Code p0449 vent solenoid intermittent

Changed vent solenoid passed smoke test still the same stuck in open position can i run new wire to vent from ecm witch ones are they please help

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  • Pontiac Master
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EOBD II Error Code: P0449
Fault:
Evaporative Emission (EVAP) System, Vent Valve - Circuit Malfunction
Possible Cause:
Wiring harness.
Evaporative emission (EVAP) canister purge valve.
Engine control module (ECM).

Posted on Dec 28, 2013

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Posted on Jan 02, 2017

  • 18 Answers

SOURCE: where is the vent solenoid for the 2005 montana sv6 fail code was p0449.

That will be your O2 sensor. It is tapped into your exhaust manifold. Very cheap fix. You can go to Autozone and get it It only takes five minutes to fix. Check it out.

Posted on Aug 04, 2012

Audioaholic
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SOURCE: 2006 torrent po446 code smoke

this could verry well be the gas cap vent broke, even if tightned still broke inside.if the smoke test was done correctly, then this should have been noticed.

Posted on Jan 05, 2011

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I changed everything on a 2007 chevy uplander the camshaft position sensor And the purged sensor And the throttle body and It cam up a new code p0449


DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit , your vent solenoid is opened or the wiring circuit is . The vent solenoid is by the charcoal canister at the gas tank .
P0449 Battery voltage is supplied to the EVAP canister vent solenoid valve. The control module grounds the EVAP canister vent solenoid valve control circuit to close the valve by means of an internal switch called a driver. The scan tool displays the commanded state of the EVAP canister vent solenoid valve as ON or OFF. The control module monitors the status of the driver.

May 03, 2016 | Cars & Trucks

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Service engine light stays changed gas cap done smoke test replaced oxygen sensor


Code 449 is for a defective vent valve solenoid. The engine computer can not open or close the valve or can not tell if the valve is operating.
The valve/solenoid would need to be tested and you will probably need a shop manual to get the testing procedure.

Mar 06, 2014 | Cadillac DeVille Cars & Trucks

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GMC Canyon problem DTC P0449


Code 449 is for a problem with the EVAP system vent valve solenoid circuit.
The solenoid may not be reacting to computer commands to open or close.
The solenoid and circuit would need to be tested.

Feb 19, 2013 | 2005 GMC Canyon

1 Answer

I have a code P0449 on my 1999 chevy malibu 3.1


check engine light ison,autozone says code is P0449 this is whattheir ticket says:

The PCM has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.

Definition:
EVAP (Evaporative Emission System) purge/vent solenoid circuit condition

Explanation:
The solenoids and system wiring are monitored for opens or shorts

Probable Causes
1- Purge or vent solenoids defective
2- Check connevtor and wiring
3- Fuel saturated vapor canister
4- Failed EVAP vent solenoid

Dec 06, 2012 | 1999 Chevrolet Malibu

1 Answer

2005 chevy 1500 silverado eng. light on ran code p0455 and p0449 how to fix the problem. and how much work it takes. thanks STEVE.


P0449 is the evap vent valve solenoid circuit malfuntion.
P0455 is an evap gross leak
Perhaps the gross leak code has to do with the vent valve. Find the vent valve. It should be near a rectangle evap canister. Maybe under the bed. The small vent line from the fuel tank will go to it. The solenoid is near the cansiter. With the key off the valve will be open. With the key on it should be closed. You may try disconnection the hose and blow through it with both key off and on and see if air will pass through. If the valve has died and is stuck open, that can be the huge leak.

If it is not the leak then a smoke machine should be used. Easier than searching the lines for bad o-rings, splits, or whatevers.

Sep 02, 2011 | 2005 Chevrolet Silverado 1500 2WD

2 Answers

I have a 2006 Chevy Tahoe...codes reported are P0449 and P0455....replaced fuel cap but did not solve problem....what are my next steps without spending tons of money at a dealership? Thanks


There may be an emissions leak but a very common issue is the canister vent valve. Make sure if you contact your local dealership that you have your vehicles vin number available.
  • P0449 - Evaporative Emission (EVAP) Vent Solenoid Control Circuit
  • P0455 - Evaporative Emission (EVAP) System Leak Detected
  • Dec 28, 2010 | 2006 Chevrolet Tahoe

    3 Answers

    Have a code p0449 have. already changed the evap vent solenoid . any suggestions?


    P0449....Evaporative Emission Control System Vent Valve/Solenoid Circuit could be the engine breather

    Dec 24, 2010 | 2002 Buick LeSabre

    3 Answers

    Code 449? what is this,anyone. tks


    Code po449 is for bad  solenoid vent valve.After replacing the valve  check for the   12 volts at the "pink" wire.
    This error relates too 

    The PCM has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.

    Definition:
    EVAP (Evaporative Emission System) purge/vent solenoid circuit condition

    Explanation:
    The solenoids and system wiring are monitored for opens or shorts

    Probable Causes
    1- Purge or vent solenoids defective.
    2- Check connector and wiring.
    3- Fuel saturated vapor canister.
    4- Failed EVAP vent solenoid.


     --------

    The cost of the vent solenoid valve is near to 30 bucks. And the valve is located near the gas tank.

    Thanks. you can rate this solution and show your appreciation.

    May 20, 2010 | 2005 Chevrolet Silverado

    2 Answers

    I HAVEA 2006 CHEVERLET SUBURBAN 1500, AND THE CHECK ENGINR LIGHT STEAYS ON. THE CODE IS P0449; WHAT IS THIS AND WHERE IS IT LOCATED AT.


    Hello. Your code indicates that your emission system is acting up. If you live in California, you might have a problem passing the next mandatory emmissions test. The PCM has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.

    Definition:
    EVAP (Evaporative Emission System) purge/vent solenoid circuit condition

    Explanation:
    The solenoids and system wiring are monitored for opens or shorts

    Probable Causes
    1- Purge or vent solenoids defective
    2- Check connector and wiring
    3- fuel, saturated vapor canister
    4- Failed EVAP vent solenoid

    Apr 08, 2010 | Chevrolet Suburban 1500 Cars & Trucks

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