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)

P1025

Jtjnt
 Share

Recommended Posts

Jtjnt Member

Jtjnt

Posted
Posted (edited)

I have read about every bit of information about this p1025 code I’m fighting with.

 

i have a 2009 cayenne s. 81,000 miles

 

it all started with a 1026,1025 and all cylinders mistfiring.  Rough and long crank times while cold.   Tell tale signs of a bad HPFP.  

I replaced that pump and did the coils and plugs and CPS at the same time.  

Cleaned the throttle body and Mass airflow sensors.

All the codes cleared except the 1025.  Car start right up cold.  Does do a little idol surging but seems to settle down after a couple mins. 

Car seems to drive fine.  The only little issue is on the highway at 2100rpm the engine may hiccup every so often. 

I haven’t done the fuel pumps or filter yet.  Was hoping someone had some ideas. 

I didn’t wanna be another guy that replaced his HPFP to have it be something else. 

 

I have also done the throttle body reset. 

 

Thanks 

Edited by Jtjnt
More vehicle information
Link to comment
Share on other sites

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.