Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

CEL P0455

Recommended Posts

The check engine light came on last night for the very first time after 39k miles in my 03 Boxster. Went to Autozone this morning and the car gave me the P0455 code. Based on some of the posts I have read, it appears that it can be as simple as replacing the gas cap. Has anybody encountered something else that they want to share?



Link to comment
Share on other sites

    You can remove these ads by becoming a Contributing Member.

  • Admin

P0455 Fuel Tank Ventilation System (Major Leak) - Below Limit

Possible fault cause

- Tank cap missing

- Tank cap seal

- Ventilation lines detached from EVAP canister

- Ventilation line detached from tank

- Ventilation line detached from fuel tank vent

- Break in ventilation lines

Link to comment
Share on other sites

  • 2 months later...

Did you find the cause of the error and correct it? I have the same error on my 99 996.

In my case I replaced the gas cap and it now occurs very infrequently and I clear it with my OBD 2.

I dont think there is really a leak because when I open the cap it hisses with the air rushing in.

I am thinking about replacing the sensor. Loren has a picture on another post but its hard to tell where it is and what it takes to change it.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.