Jump to content

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)

P0491-Secondary Air Injection System 2004 Cayenne S

jrgcom
 Share

Recommended Posts

jrgcom Member

jrgcom

Posted
Posted

My 2004 cayenne S with 188,000 (I am original owner), has a code P0491 which I determined was a blown fuse for Bank side 1 (passenger side of car). I replaced fuse and it has blown our immediately upon cold startup. What should i explore to find the culprit? Also, I added tires yesterday to the rear,  and I now have  a flashing PSM on dash when rpm is above 4000 or above 60 mph, in stop and go traffic, I noticed if I speed up to about 20, slack off throttle, there are a couple of clunk sounds coming from the rear of car (does not appear to be shifting on the display, only on occasion it has a hard shift, does this in manual and drive). Does this relate to a P0491 code? 

jrgcom Member

jrgcom

Posted
  • Author
Posted

Does this affect the transmission shift or the sound I am hearing tin the rear of the car at low speed once I accelerate and slow in traffic?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing
×
×
  • 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.