DIY Fix for "Loose Gas Cap" indicator aka code P0449 w/Pics - CorvetteForum - Chevrolet Corvette Forum Discussion


C6 Corvette General Discussion
General C6 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

     
Old 03-25-2015, 12:54 PM
How-Tos on this Topic
 
Last edit by: IB Advertising
See related guides and technical advice from our community experts:

Browse all: Interior How-Tos
Print Wikipost

DIY Fix for "Loose Gas Cap" indicator aka code P0449 w/Pics

Reply
 
 
 
Thread Tools Search this Thread
Old 10-25-2012, 05:50 PM   #1
JKbride
CF Senior Member
Support Corvetteforum!
W. GA Events Coordinator
St. Jude Donor '12-'13-'14-'15
Thread Starter
 
JKbride's Avatar
 
Member Since: Jul 2011
Location: Carrollton GA
Posts: 2,081
Thanked 30 Times in 5 Posts
Default DIY Fix for "Loose Gas Cap" indicator aka code P0449 w/Pics

Driving down the road and you see "Check Gas Cap" warning come up on the Drivers Info Center (DIC)...take heart, it's an easy fix and does not take much time or money to repair yourself.

First, check your fuses and your gas cap. The cap should be on good and make sure it's secure. Tank up and drive your car for about 50 miles. If the code does not clear you should replace your gas cap. I purchased one from my local Chevrolet dealer for $22.

Secondly, if after tanking up and replacing your gas cap the warning does not clear, then it's time to use your trusty code reader and see if you can't read and clear the code. If you don't have one you can purchase them at your local parts store for about $50.

Plug it in the OBD adapter located under the driver’s side dash.

Follow your reader’s instructions and read the codes.

In my case I had a P0449 and a P0455. P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction and P0455 Evaporative Emission Control System Leak Detected (gross leak)




I tried resetting my codes, but they would come back within seconds. The next step is purchase a new Fuel Vent Solenoid from your local dealer. In my case it was about $25. GM also recommends an upgraded harness ($30)...but it was not needed, so I will return it.


The Fuel Vent Solenoid is located on the passenger side tank near it’s top and is easy to get to. I removed my rear tire, jacked up the car, placed jack stands and chocks (I'm super cautious under a car).


Once under the car this is what you will see, and I have my finger on the part:


Remove the Vent Hose (it runs to your emissions canister) using a pair of pliers. You can rotate the clamp if needed to access the dog ears to open the clamp.



Unplug the power connection


Slide the Vent Solenoid Assy of its bracket. Although it looks like it would slide towards the front of the car it does not. Simply lift the back of the assy high enough for the dog ear to clear the back of the bracket and slide toward the rear of the car. The pic below shows you how it mounts and the dog ear location.


Put the new Vent Solenoid Assy back on by placing it on the bracket and slide it towards the front of the car. You will hear it click in place. Plug the power plug back in and reconnect the hose.

Here is the new one installed.


Now plug your code reader back in and scan for codes. If they come up hit erase.

This is what you should now see on your code reader. No Codes and the DIC is clear with no check engine light or warnings.





From start to finish the repair took 20 mins. The cost of the parts, including gas cap was about $50 and if the harness is needed it's about $80. If you don't have a code reader add another $50. Only tool needed is a pair of pliers.

In all this is a simple repair and does not cost much in terms of time or money to do yourself.

I hope this helps,
John

Last edited by JKbride; 03-30-2014 at 06:04 PM.
JKbride is offline   Reply With Quote
The Following 15 Users Say Thank You to JKbride For This Useful Post:
Ben101er (06-03-2016), ClashBandicoot (08-09-2016), COCO RICK (02-17-2017), corrado (10-14-2015), duckvett (09-24-2015), HK770 (01-04-2016), Itshakes (08-25-2016), Mark.S+10 (10-06-2015), need-for-speed (10-20-2015), nolanrj (03-07-2016), PDsVettes (04-19-2016), Turbo6TA (01-16-2017), Vet Interested (01-03-2016), Yaupon (04-19-2016), _05C6_ (10-09-2015)
Old 10-25-2012, 05:52 PM   #2
tclhb
CF Senior Member
 
tclhb's Avatar
 
Member Since: Mar 2009
Location: Huntington Beach CA
Posts: 336
Thanked 0 Times in 0 Posts
Default

Nice write up!
tclhb is offline   Reply With Quote
Old 10-25-2012, 05:55 PM   #3
Don-Vette
CF Senior Member
 
Don-Vette's Avatar
 
Member Since: Jan 2011
Location: Tonawanda New York
Posts: 11,154
Thanked 194 Times in 165 Posts
Default

Thanks,well done!
Don-Vette is offline   Reply With Quote
Old 10-25-2012, 05:59 PM   #4
EVRose
CF Senior Member
 
EVRose's Avatar
 
Member Since: Oct 2010
Location: Las Vegas NV
Posts: 10,951
Thanked 311 Times in 246 Posts
Default

Quote:
Originally Posted by tclhb View Post
Nice write up!
and I don't think I've ever read here anyone needing to replace a Fuel Vent Solenoid before.
EVRose is offline   Reply With Quote
Old 10-25-2012, 06:01 PM   #5
LIE2ME
CF Senior Member
 
LIE2ME's Avatar
 
Member Since: Apr 2012
Location: Camden SC
Posts: 3,201
Thanked 194 Times in 92 Posts
Default

I had the same gas cap message on my 2012. Turns out, unlike most cars, where you need to push the gas cap inward and turn, the 'Vette requires simply that one set the cap on the nozzle and gently twist the cap. DO NOT push at all, just turn clockwise and you're set (my dealer pointed this out).

No error messages since I learned this simple process...
LIE2ME is offline   Reply With Quote
Old 10-25-2012, 06:01 PM   #6
vette6500
CF Senior Member
 
vette6500's Avatar
 
Member Since: Jun 2005
Location: Los Angeles CA
Posts: 688
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Nice fix!
I assume it fixed the malfunction, but what was the leak code about?
vette6500 is offline   Reply With Quote
Old 10-25-2012, 06:02 PM   #7
plmkrzy
CF Senior Member
 
Member Since: Oct 2001
Location: orange county n.y.
Posts: 2,003
Thanked 3 Times in 3 Posts
Default

Thanks for the info. Appreciated!
plmkrzy is offline   Reply With Quote
Old 10-25-2012, 06:07 PM   #8
MikeyTX
CF Senior Member
Support Corvetteforum!
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17
NCM Lifetime Member
 
MikeyTX's Avatar
 
Member Since: Sep 2005
Location: Slowly driving my way around the United States
Posts: 24,473

Thanked 410 Times in 330 Posts
Default

you need to contact one of the mods and have this put into the DIYS sticky. It's worth it's weight in gold !
MikeyTX is offline   Reply With Quote
Old 10-25-2012, 06:07 PM   #9
JKbride
CF Senior Member
Support Corvetteforum!
W. GA Events Coordinator
St. Jude Donor '12-'13-'14-'15
Thread Starter
 
JKbride's Avatar
 
Member Since: Jul 2011
Location: Carrollton GA
Posts: 2,081
Thanked 30 Times in 5 Posts
Default

Quote:
Originally Posted by vette6500 View Post
Nice fix!
I assume it fixed the malfunction, but what was the leak code about?

They are both related to the failure of the Fuel Vent Solenoid. The system was detecting a large escape of fumes...I suspect because the solenoid was in the open position at all times.

This is also why you may get the same code when the gas cap is loose or off because the fumes are freely escaping and not being routed to the emissions canister.

Hope this helps,
John
JKbride is offline   Reply With Quote
Old 10-25-2012, 06:12 PM   #10
dvilin
CF Senior Member
 
dvilin's Avatar
 
Member Since: Nov 2007
Location: Rochester New York
Posts: 35,360
Thanked 1,303 Times in 1,009 Posts
Default

Good info, thanks.
dvilin is offline   Reply With Quote
Old 10-25-2012, 06:22 PM   #11
glenB
CF Senior Member
St. Jude Donor '08-'09 & '12, '14
 
glenB's Avatar
 
Member Since: Jan 2004
Location: Pinellas Park Fl
Posts: 4,974
Thanked 4 Times in 4 Posts
Default

P0449 is strictly the Vent Valve Solenoid Failure and is not the same as the gas cap which is generally a P0442 Small Leak or P0455 Gross leak
glenB is offline   Reply With Quote
Old 10-25-2012, 06:30 PM   #12
N2TU
CF Senior Member
Support Corvetteforum!
St. Jude Donor '10-'11-'12-'13-'14-'15-'16-'17
 
N2TU's Avatar
 
Member Since: Sep 2009
Location: Mooresville North Carolina
Posts: 2,341
Thanked 57 Times in 44 Posts
Default

Quote:
Originally Posted by tclhb View Post
Nice write up!
Super Job!

That is what this Forum is all about!...thanks!

N2TU is offline   Reply With Quote
Old 10-25-2012, 06:40 PM   #13
RJRSW
CF Senior Member
 
RJRSW's Avatar
 
Member Since: Apr 2010
Location: Tucson Arizona
Posts: 3,108
Thanks: 0
Thanked 14 Times in 12 Posts
Default

The gas cap is covered and replaced free by GM under the Emission Select Component Ltd Wty if the vette was delivered less than 8 years ago and has less than 80,000 miles on it since delivery.
RJRSW is offline   Reply With Quote
Old 10-25-2012, 06:47 PM   #14
Mike's LS3
CF Senior Member
 
Mike's LS3's Avatar
 
Member Since: Nov 2007
Location: Bay Area CA
Posts: 2,860
Thanked 80 Times in 74 Posts
Default

Nice write up it will benefit others in the future. That's what the forum is all about.
Mike's LS3 is offline   Reply With Quote
Old 10-25-2012, 06:54 PM   #15
RO55
CF Senior Member
 
RO55's Avatar
 
Member Since: Oct 2011
Location: Port Saint Lucie Fl.
Posts: 1,925
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Thanks!
RO55 is offline   Reply With Quote
Old 10-25-2012, 07:56 PM   #16
not08crmanymore
CF Senior Member
 
not08crmanymore's Avatar
 
Member Since: Jun 2008
Posts: 19,451
Thanks: 0
Thanked 65 Times in 54 Posts
Default

Nice write up and the gas caps have a 10 year 120,000 mile warranty on them since 2005.
not08crmanymore is offline   Reply With Quote
Old 10-30-2012, 03:25 PM   #17
ANGRY Z
CF Senior Member
Support Corvetteforum!
 
ANGRY Z's Avatar
 
Member Since: Jul 2009
Location: Hoptown KY
Posts: 644
Thanks: 0
Thanked 2 Times in 2 Posts
Default

Im thinking I may need to do this. Keep getting the silly "check gas cap" message on DIC after replacing gas cap with a new one. Thanks for posting up.
ANGRY Z is offline   Reply With Quote
Old 10-30-2012, 03:52 PM   #18
LS WON
CF Senior Member
 
LS WON's Avatar
 
Member Since: Dec 2002
Location: San Francisco CA
Posts: 30,114
Thanked 33 Times in 32 Posts
Default

LS WON is offline   Reply With Quote
Old 10-30-2012, 04:09 PM   #19
TCW
CF Senior Member
Support Corvetteforum!
St. Jude Donor '06-13,'16
 
TCW's Avatar
 
Member Since: Jan 2001
Location: Maryville TN
Posts: 5,301
Thanked 11 Times in 11 Posts
Default

Quote:
Originally Posted by MikeyTX View Post
you need to contact one of the mods and have this put into the DIYS sticky. It's worth it's weight in gold !
Excellent post. Thanks!

Tom
TCW is offline   Reply With Quote
Old 10-30-2012, 04:09 PM   #20
Globeman
CF Senior Member
 
Globeman's Avatar
 
Member Since: Aug 2010
Location: Brewster NY
Posts: 499
Thanked 23 Times in 16 Posts
Default

Quote:
Originally Posted by EVRose View Post
and I don't think I've ever read here anyone needing to replace a Fuel Vent Solenoid before.
I replaced mine about a year ago to fix a P0449 Code. They do fail.
Globeman is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • DIY Fix for "Loose Gas Cap" indicator aka code P0449 w/Pics
  •  
     
    Reply

    Related Topics
    Thread Thread Starter Forum Replies Last Post
    DIY Plugs and Wires with lots of Pics JKbride C6 Corvette General Discussion 52 04-15-2017 04:50 PM
    Key Fob Battery Replacement DIY JKbride C6 Corvette General Discussion 227 09-01-2016 06:51 PM
    Scotch drinkers enter-Scotch with a Corvette Connection. JKbride Off Topic 33 02-14-2016 04:47 PM
    Rear bumper cover letters DIY with Pics JKbride C6 Corvette General Discussion 11 10-07-2013 05:57 PM
    Renewed my brake calipers -Pics JKbride C6 Corvette General Discussion 33 07-26-2012 10:17 PM


    Thread Tools Search this Thread
    Search this Thread:

    Click for Advanced Search

    Posting Rules
    You may not post new threads
    You may not post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off

    Forum Jump


    All times are GMT -4. The time now is 08:16 PM.


     
    • Ask a Question
      Get answers from community experts
    What's your question?
    Send