P0449-How To Replace Evap. Vent Solenoid

[Rtibbs]

I have been reading through this forum for a while now trying to figure out the problem with my truck. I guess this is a common problem that chevy doesn't want to fix. I have a 2005 chevy silverado Z71 5.3L crew cab. At about 95,000 miles the check engine light came on. The P0049 code came up. So here are my questions...

1. Is it really necessary to replace the evap vent valve solenoid with the kit with the extra filter?

The replacement kits run from $65 to $160 depending where you buy it. I think i found an AC Delco 214-2082 on amazon for around $65. That's not including the heater hose.

I have only been able to find one original part....Duralast PV485 from autozone. It's $23.99.

If the original part lasted 95,000 miles, I cant understand why I need to spend $65 for the kit when i can get the solenoid with the canister for $23.99.

2. After driving around withe the check engine light on for a week or so, I checked the codes again. It now shows two codes. P0049 and P0049P.

Does anyone know what the difference is? I havent been able to find what the (P0049 P) code is...

 

[Bigredmariner]

I have been reading through this forum for a while now trying to figure out the problem with my truck. I guess this is a common problem that chevy doesn't want to fix. I have a 2005 chevy silverado Z71 5.3L crew cab. At about 95,000 miles the check engine light came on. The P0049 code came up. So here are my questions...

1. Is it really necessary to replace the evap vent valve solenoid with the kit with the extra filter?

The replacement kits run from $65 to $160 depending where you buy it. I think i found an AC Delco 214-2082 on amazon for around $65. That's not including the heater hose.

I have only been able to find one original part....Duralast PV485 from autozone. It's $23.99.

If the original part lasted 95,000 miles, I cant understand why I need to spend $65 for the kit when i can get the solenoid with the canister for $23.99.

2. After driving around withe the check engine light on for a week or so, I checked the codes again. It now shows two codes. P0049 and P0049P.

Does anyone know what the difference is? I havent been able to find what the (P0049 P) code is...

The "fix" by Chevy is the new relocated filter box arrangement. If your truck was still within the evap warranty period GM would warranty it. But most of us have this problem after the 36K- 36 month warranty expires. ( I think that's the correct time frame for the evap portion of the warranty).

1: If the original style has lasted you this long, why not give the cheap one a try? It's only a few bucks.. The old style along with your surrounding conditions has done well.

2: I've never seen the P0049P code, google also was a flop for me finding it. My 2006 Silverado only had the P0449, which I think is what you're referring to P0449.

Which ever route you choose, even if you do both, will still be cheaper than a trip the dealership. Let us know how it turns out for you.

 

[Rtibbs]

My truck is way out of warranty. Im going to try the cheap fix first. It's just a bit hard to get the part...You have to get the store to special order it. I couldnt even find that part online. The part should be here in a few days. I'll let you know how it turns out.

 

[Rtibbs]

update

So i changed out the Evap canister vent solenoid by the gas tank and the purge valve on the intake. For the evap solenoid I used part number PV-485 from autozone that was $23.99. The purge valve was $32.99 from autozone also, for a total of $61.68 after tax. Both parts took all of about 6 minutes to change out. Took me longer to get my tools out. I cleard the codes, and checked out my vehicle with a SOLUS PRO scanner. Everything came up good and all I/M's came up "ready." Three days later and no check engine light on.

It seems a bit difficult to get the original evap vent solenoid. Most everywhere I went tried to sell me the "gm fix" which was $113 just for the solenoid. Other websites even stated that the original part would not fit a 2005 chevy silverado 5.3L engine. WTF

So for anyone else getting a code of P0049 and a Chevy silverado, I would start by changing out the evap solenoid. I found a website you can order one for about $20. RockAuto.com. Airtex/Wells Part No. 2M1119. This is a single port evap canister solenoid. This is what the truck originally came with. I say screw the GM "fix" and put this part in. Even if it doesnt last but a year or two, it's still cheaper to change this part out 5 times for the price of the gm "fix" part.

Im summary, the dealer wanted about $520 to diagnose and change out the evap solenoid, and another $300 plus to change out the purge valve.

It took LESS than 10 minutes to chage out both parts and i spent $61.68 vs OVER $800 that the dealer wanted!!!

 

[Bigredmariner]

Good info, thank you so much for taking the time to post after you fixed the issue.


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[ofishinrod]

I've also read all the helpful pages. Can anyone assist in helping with a 2009 Silverado...part # for the solenoid valve only?

Awesome website by the way....going to have to stick around

 

[Rtibbs]

What code do you having coming up? And I need more information on your vehicle.... Vin letter and engine size, 4 wheel drive or 2 wheel drive, etc. do you have an autozone where you're at? Autozone was the only store I could find a replacement part that was the same as the original part. All the other stores only carried the "gm fix" part that was about $113. I say screw the gm fix cause appartently it only last a few years also.

 

[Flukon]

2006 Yukon - P0455/P0462 - Same issue?

I know this is an old post but still really active. I have been having evap issues on a 150k+ mile GMC, wondering if anyone has experienced these codes and your resulting fix as tied together (great post btw!). I've been putting off the dealer, gas mileage doesn't seem to be impacted, but the lights are really getting annoying...

I know the p0462 may be a separate issue with the fuel level sensor from what I can find online, but wondering if anyone else has experienced the same problem and if this fix worked?

Thanks much, where would we be without the web for things like this? Much poorer I'm sure

 

[Bigredmariner]

I know this is an old post but still really active. I have been having evap issues on a 150k+ mile GMC, wondering if anyone has experienced these codes and your resulting fix as tied together (great post btw!). I've been putting off the dealer, gas mileage doesn't seem to be impacted, but the lights are really getting annoying...

I know the p0462 may be a separate issue with the fuel level sensor from what I can find online, but wondering if anyone else has experienced the same problem and if this fix worked?

Thanks much, where would we be without the web for things like this? Much poorer I'm sure

It is extremely possible for the vent valve solenoid to be causing the P0455. If the vent valve is stuck open or has stopped working completely it could allow virtually no vacuum to be drawn on the evap system.

Large Leak Test
The Large Leak diagnostic tests for large leaks and blockages in the EVAP system. With the engine running, the PCM commands the EVAP vent solenoid “on” and commands the EVAP purge solenoid “on”, allowing engine vacuum into the EVAP system. The PCM monitors the fuel tank pressure (FTP) sensor signal to verify that the system is able to reach a predetermined level of vacuum within a set amount of time. Next, the PCM commands the EVAP purge solenoid “off”, to seal the system, and monitors the vacuum level for decay. If the PCM does not detect that the predetermined vacuum level is achieved, or the vacuum decay rate is more than a calibrated level on two consecutive tests, DTC P0455 will be set.

 

[Flukon]

Thanks, just checked the part on amazon and for $13 I'm sure I can't go wrong giving it a shot!