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)

2001 986S throwing 4660 ABS/PSM error message


Recommended Posts

This car is primarily an Autocross P03 class car that is street legal. The problem I am having is that towards the end of a 6 run day, I get the ABS/PSM lights and a 4660 code on the reader. If I reset it right after it shows up, it comes back as soon as I start the car. If I let the car sit for a few hours, and reset the 4660 code all is good until the brakes are thrashed again. My suspicion is the ABS pump assembly, any thoughts?

Link to comment
Share on other sites

    You can remove these ads by becoming a Contributing Member.

  • Moderators

That code is for the pressure sensor in the ABS system; could be the sensor itself, but considering when it happens on your car, you could be boiling the brake fluid.  Have you checked the moisture level in the system?  If it isn’t that, most likely it is the system pump, but I would eliminate all possibles first as the pump is pricey.😣

Link to comment
Share on other sites

  • 2 weeks later...

Perfect solution. 4+% water in the BF. The BF I used came from six year old unopened plastic bottles that I had bought a case of. I opened a fresh one and it was at 3+%. Then went to the store, bought a fresh bottle and it read less than 1%. So I guess long term storage in sealed plastic bottles for BF isn't such a good idea!

Link to comment
Share on other sites

  • Moderators
1 hour ago, John Orrell said:

Perfect solution. 4+% water in the BF. The BF I used came from six year old unopened plastic bottles that I had bought a case of. I opened a fresh one and it was at 3+%. Then went to the store, bought a fresh bottle and it read less than 1%. So I guess long term storage in sealed plastic bottles for BF isn't such a good idea!

 

Brake fluids have a defined shelf life, usually around two years in unopened metal containers, but I have no data on plastic.  This is exactly why it is always a good idea to own a brake fluid moisture tool, which is cheap insurance.  😉

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.

Guest
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.