Code P0449?

[DareDog]

2005 1500 5.3l. Light just came on yesterday.

[txab]

Read

 

P0449

[DareDog]

Could gas cap be issue?? Last week went and got gas and then the truck sat for a week and just drove it other day and Engine light came on. Reset the light so it's off and drove it today and on dash it said "tighten gas cap".

[Duelin]

P0449 V8 5.3

EVAP Vent Solenoid Control Circuit Fault The ECM detects the voltage on the EVAP canister vent valve control circuit is between 2.6-4.6 volts when the driver is commanded off,for more than 4 seconds

Probable Cause

1. Open or short circuit condition
2. Poor electrical connection
3. EVAP canister vent valve
4. ECM fault

[TooTall1]

Do you overfill or top off your tank when you put gas in? If you do STOP! This is a major cause of the evap solenoid failing. I was guilty of this on my 2008 and had this issue. I replaced my evap solenoid, stopped overfilling and no more problems. Just remember to stop topping off, rounding up and stop filling when the nozzle clicks off.

[ram1067]

evap solenoid Question.....I got the damn code p0449

So I took I look and noticed that the solenoid "rattles" when I Shake it.. Is this normal or could something come loose internally causing the code

[Bob D]

....solenoid "rattlers" when I Shake it.. Is this normal...

I wouldn't think so.

Bench test it with 12VDC and see if it's working.

[NARDA1]

Got the same code on my truck last week when I was returning from Canada, I got the code cleared and drove 500 miles home with no light, started the truck the next day and the light came on. I had a spare gas cap so I tried that but the light came back on after clearing the code. Went to the dealer and got a replacement solenoid # 25932571 for about $25 took less than 30 minutes to install.

 

Also read this post: http://www.gm-trucks.com/forums/topic/75210-evap-vent-valve-solenoid/?p=894310

[ram1067]

Got the same code on my truck last week when I was returning from Canada, I got the code cleared and drove 500 miles home with no light, started the truck the next day and the light came on. I had a spare gas cap so I tried that but the light came back on after clearing the code. Went to the dealer and got a replacement solenoid # 25932571 for about $25 took less than 30 minutes to install.

 

Also read this post: http://www.gm-trucks.com/forums/topic/75210-evap-vent-valve-solenoid/?p=894310

Yeah this will be the second one.....just was wondering if it supposed to rattle in inside. Like something broke off in side.

[DareDog]

Going to see if this fixes it

 

 

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[kstruckcountry]

I'd recommend going with the updated solenoid if you drive on much dirt. I located the intake under the hood.

 

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[Nanotech Environmental]

Going to see if this fixes it

 

 

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I just replaced mine with the same one as you have there. I relocated it to a better spot as some of the extended cabs have it in the stupidest location possible.

Some pics on p9 of this thread- http://www.gm-trucks.com/forums/topic/83753-evap-vent-valve-location/page-9

[DareDog]

Good to know thanks. Crew cab truck here.

 

 

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[DareDog]

So far so good. Light has not come back on.

 

 

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