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Check engine light code P0449


07tahoe's Avatar
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August 8th, 2008, 6:41 PM   #1  
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.

 
in2pro's Avatar
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August 8th, 2008, 9:31 PM   #2  
RE: Check engine light code P0449

the connector its refering to




if you spend any money or your Tahoe spend it on the factory service manual!

 
07tahoe's Avatar
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August 14th, 2008, 6:23 PM   #3  
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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August 15th, 2008, 8:28 AM   #4  
RE: Check engine light code P0449

No problem glad to have helped, were the images any help?

 
biged412's Avatar
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February 21st, 2010, 10:41 AM   #5  
location of evap solenoid

What is the general location if the soliniod ? THANKS

 
73shark's Avatar
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February 21st, 2010, 4:46 PM   #6  
Welcome to the forum. I think it's up around the tank filler tube.

 
marine02xx@yahoo.com's Avatar
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May 14th, 2010, 11:21 AM   #7  
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 [email protected]; June 7th, 2011 at 7:53 PM. Reason: Pics added
 
4HANDSDC's Avatar
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May 24th, 2010, 7:45 PM   #8  
p0449

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

Chris

 
73shark's Avatar
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May 24th, 2010, 7:55 PM   #9  
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.

 
fschlenter911's Avatar
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July 6th, 2010, 9:06 AM   #10  
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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