Question about Chevrolet Cavalier

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Engine light is on. a diagnostic suggested a possible defective vent solenoid...where is this part located?

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  • Anonymous Mar 22, 2011

    You gave no vehicle
    Ususally under back, on EVAP
    System

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First try the gas cap to make sure it is on secure and tight.

Code P0440 indicates a problem with the EVAP vent solenoid, which essentially controls the venting of your gas tank in order to maintain a consistent pressure in the tank. This solenoid is mounted on the back of the chassis cross-member just behind your gas tank.

However, a loose or leaking vent hose that connects to this solenoid can also cause this code to appear.

Code P0446 indicates that the VCM (Vehicle Control Module) received
a failure when it tested the EVAP vent solenoid.
The VCM monitors the performance of the Evaporative Emission (EVAP) system by applying a predetermined level of vacuum to the EVAP system and monitors the vacuum decay rate. The VCM sets this code if the vacuum decay rate is more than a predetermined value.

Again, this could indicate a loose or leaking vent tube.
This solenoid is very easy to test simply by first checking for continuity across the coil, if that's good then applying 12 volts across the two pins on it will cause it to "click" changing the position of the valve.

Posted on Mar 22, 2011

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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

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Engine light on, all levels checked and filters new. Taken to Auto Zone and OEM number to cross is P0443. List was Puge or vent solenoid defective, connector and wiring, Fuel saturated vapor canistar,...


Try disconnecting your battery for 15 minutes...then re-connect. This will reset all of the solenoids to factory specs...and will clear the engine light. If the engine light comes back on then you should try to get diagnosed at a free diagnosis service shop...you may need to call a few. Hope this helps.

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Po 440 code check engen


p0440 is an evaporitive emission system system large leak detected generally on an 02 gm vehicle it is very common that the vent solenoid located by the fuel tank if you replace it the light will take a few days to clear its self. the vehicle runs tests on all sensors and systems and the test has to pass or fail a number of times before the pcm will turn on or turn off a check engine light.

Dec 20, 2010 | 2002 Chevrolet TrailBlazer

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What is code 455 (Check engine soon light) on my 2004 Chevy Trailblazer, 4.2l


CODE PO455 - EVAP SYSTEM LARGE LEAK DETECTED CONDITIONS.POSSIBLE CAUSES FUEL CAP LOOSE MISSING,FUEL TANK FULLER NECK OR FUEL SENDING UNIT O - RING IS LEAKING, FUEL TANK PRESSURE SENSOR IS DAMAGED,FUEL TANK VAPOR LINES,CLOGGED,DAMAGED,OR DISCONNECTED,PURGE VALVE VAPOR LINE IS CLOGGED,DAMAGED,OR DISCONNECTED,PURGE SOLENOID IS NOT OPENING,IT MAY BE DAMAGED OR STICKING,VENT SOLENOID IS NOT CLOSING,MAY BE DAMAGED OR STICKING,PCM HAS FAILED.

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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

1 Answer

What is the EVAP system and the FTP sensor . Service light is on and that was the diagnostic. EVAP canister or vent solenoid.


The EVAP cannister is a charcoal cannister located under your hood, the solenoid operates the EVAP system, the cannister is a fixed part with no electronics or moving parts, I would try the solenoid, as it has both moving parts and it electric. Reset check engine light after repair. Let em know if this helps.

Oct 27, 2009 | 1998 Ford Taurus

2 Answers

Service engine light keeps coming on. OBDII P0446


Hi

This engine code is related to a malfunction in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.

Probable causes are;

1- Purge or vent solenoids defective.
2- Defective wiring or bad connections in the vent valve/solenoid circuit.
3- Fuel saturated vapor canister.
4- Failed EVAP vent solenoid.

These engine codes are useful indicators to where the fault lies but usually require further troubleshooting to fully determine the underlying cause.

However I have listed the probable causes so to give you a starting point for your investigations.

Hope this helps. Please remember to rate my answer. Thanks.

Jul 17, 2009 | 2000 Chevrolet Tahoe

1 Answer

'99 olds 88 diagnosed PO 446 evap vent control problem


Your code means:

P0446 onepx.gif EVAP Canister Purge Vent Blocked

Some of the possible causes:

EVAP vent fresh air hose is clogged, kinked or restricted
EVAP Vent solenoid is contaminated, damaged or has failed
FTP sensor is out-of-calibration, damaged or "skewed"
PCM has failed

All tough thing for a lay person to check. You don't have to take it to the dealer, any repair garage that has the proper equipment can fix this for you.

Feb 09, 2009 | 1999 Oldsmobile 88

1 Answer

Check engine soon light. diagnosed as troble shooting codepo44


Change the evap vent solenoid canister located near the master cylinder on the right side of the engine or your hoses may be cracked. Good luck!

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