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)

Recommended Posts

Hello all,

I have been lurking around here for almost 2 years.

I have a 2006 Cayenne S with automatic transmission with about 70,000 miles. This morning I went to drive it to the car wash. When I went to accelerate onto the autobahn the engine acted as if it were in limp mode. There was no power under load above 3,500 RPM. In neutral the engine will not rev past 4200 RPM.

Here is what it is not doing or has been replaced

- It starts and idles fine.

- plugs and coils replaced last year less than 10 thousand miles ago.

- I do not have a check engine light on.

I am thinking:

1. MAF sensors (looks like a special tool required for replacement).

2. Throttle position sensor

3. Fuel Filters

4. Fuel Pumps

5. Or another sensor related to fuel pressure or fuel regulation/delivery system.

Does anyone have any trouble shooting tips or advice before I give up and take it to the dealer?

Edited by smellthebeans

Share this post

Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

It's hard to guess.

Read error codes first.

Well not having an OBD code reader makes it a little hard ( durametric not compatible with Mac). I would have thought the CEL should have came on.


Edited by smellthebeans

Share this post

Link to post
Share on other sites

If the CEL is not lit there could be still a fault code pending, this being said, i would leave the DME reprogram. There may be involuntary reboot happened and the DME is slipped back in limited factory modus.

Share this post

Link to post
Share on other sites

As of right now it is the Throttle Positioining Sensor....an 80 euro part. :thumbup:

It was tested twice while I was there...and apparently it was within tolerance. But, the technician appeared to almost argue (in a polite manner) with the senior mechanic that this was indeed the fault.

I am also having the right side headlight mounting plate replaced while it is there so the dealer can properly aim the headlights.

Edited by smellthebeans

Share this post

Link to post
Share on other sites

To close this one out. It was the throttle position sensor. It did not leave a hard fault in the memory. Dealer essentially took a "shot in the dark" and replaced the sensor and that solved the problem.

thanks everyone!

Share this post

Link to post
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.

Sign in to follow this  

  • Similar Content

    • By Joe Burum
      07 S sometimes goes into limp mode even after replacing throttle body and complete accelerator assembly (both new parts).   No error code.  Can be fixed by switching off and restarting.  Any clues?  Sorry if this is a duplicate but I can’t find a relevant thread. 
    • By liscio
      My 2004 CS seems to be a little weak to get up & go since I got it last summer, but still much more power than the car it replaced. I wrote it off thinking, "it's not a turbo, so what do you expect?"
      I did the plugs and air filters in the fall, and replaced the valve cover gasket on the driver side where it leaked the most. Still no major differences, not that I expected any.
      Went out to buy some throttle body cleaner the other day, and on my way to the store I got a phone call which prompted me to turn off the climate control (click the fan speed down to 0, temperature display shows 'OFF'). On my drive home the Cayenne drove *totally* differently. Really ballsy on the pickup, tons of pull. 
      A few days later, I realized the car was especially chilly / foggy, so I turned the climate control back on. Sure enough, she was sluggish again to get going!
      Anyone see this kind of thing before, and know what might be causing it? As far as I know, most cars "back off" on A/C and heat when the driver calls for acceleration, but that's definitely not happening here. Also, with the colder weather I'm not sure whether the Cayenne is engaging the A/C in addition to the heat.
      Any insight would be appreciated!
    • By bigscotia10
      I'm getting a weird buzzing noise (buzz/whine) when above 4000 RPM. It's a 997S 1st gen no mods, with about 70k on it. It sounds a bit like the car is struggling at anything past 4000 RPM.. It happens in gear and in neutral. When its hot and cold. if anyone has any ideas of parts I should look at, that may be causing this, please let me know!
      I'll post a video of the sound in the next couple of days too, so you can hear what it sounds like.
      Thanks a lot!
    • By widebodytarga
      Porsche is notorious for their conservative performance numbers when advertising their cars acceleration stats. That being said, they list the 997.1 Carrera 4/Targa's are going 0-60 in 5.4 with the tiptronic transmission. I've searched all over the net but cant seem to find a magazine which tested one of these cars with the tip trans. I know the car is way faster then 5.4 0-60 as I also own an infiniti G37s coupe which has the same peformance numbers claimed but my targa easily rips it by several car lengths to 60. Any idea how fast these cars actually are?
    • By apex944
      Is there a "shadetree" method to determining if the resonance flap on the 996 intake is opening at the correct RPM?
      I can test the solenoid that triggers the vacuum but I want to know if the flap is actually opening @ the correct RPM.
  • 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.