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Tahoe & Suburban The power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.

2013 Chevrolet Suburban
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  #1  
Old 08-08-2008, 05:41 PM
 
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Default Check engine light code P0449

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


any info and help is appreciated.
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  #2  
Old 08-08-2008, 08:31 PM
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Default RE: Check engine light code P0449

the connector its refering to

Click the image to open in full size.


if you spend any money or your Tahoe spend it on the factory service manual!
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  #3  
Old 08-14-2008, 05:23 PM
 
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Default RE: Check engine light code P0449

Turned out to be the vent solenoid valve, 30 bucks at the dealer and i installed it in 10 minutes, thanks in2pro for the info [/align]
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Old 08-15-2008, 07:28 AM
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Default RE: Check engine light code P0449

No problem glad to have helped, were the images any help?
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Old 02-21-2010, 09:41 AM
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Default location of evap solenoid

What is the general location if the soliniod ? THANKS
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Old 02-21-2010, 03:46 PM
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Default

Welcome to the forum. I think it's up around the tank filler tube.
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  #7  
Old 05-14-2010, 10:21 AM
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Default

If you have a Tahoe, it will likely be attached ot the EVAP canister near your gas tank. I have attached a few images that should help you locate it:

EVAP Canister Vent Valve (2005 Chevy Tahoe)


Service Manual's description of EVAP System




Hope this helps!!

marine02xx

Last edited by marine02xx@yahoo.com; 06-07-2011 at 06:53 PM. Reason: Pics added
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  #8  
Old 05-24-2010, 06:45 PM
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Default p0449

Could this sensor have any thing to do with rough idle. Or hard starting. Making the engine die at idle intermittently.

Chris
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Old 05-24-2010, 06:55 PM
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Welcome to the forum.

I doubt it since it is in the evap. emission loop. Could be dirty injectors, dirty throttle body, dirty idle air control. Try running a couple of bottles of Techron thru it.
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  #10  
Old 07-06-2010, 08:06 AM
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Default On Track - ?? P0449

Guys,

I have looked at the threads and wanted to ask for your help! I have a Chevy Avalanche 2007 with the P0449. Looks like it is either a gas cap ($35) at Pohanka Chevrolet (not likely), or the EVAP Canister Vent Valve ($42). Both in stock. They do not have a manual but highlighted Helm Inc. adn 1-800-782-4356 to get it.

anyway, I will inspect the gas cap. Should I replace it either way. In other words, can there be a problem that's not visible.

I am not a mechanic by any means. Is the EVAP Canister Vent Valve easy to replace?

thanks and nice forum.
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Old 07-06-2010, 08:06 AM
 
 
 
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canister, cavalier, charcoal, check, code, control, emissions, engine, gm, light, p0449, purge, suburban, system, valve, vent


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