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)

Error codes, engine running rough, check engine blinking....


Go to solution Solved by CharlieRST,

Recommended Posts

I have a 2009 Cayenne S with about 131K miles.  Just spent $2700 replacing the fuel pump and thermostat so I'm not a happy camper.  Today the engine started running rough and the check engine light is blinking.  I hooked up the Durametric and got 3 error codes:

 

1352 Valve lift control cylinder 6

2A04 Mixture beh. cat. conv Bank 2

0306 DME control unit faulty: EEPROM no signal/comm

 

I found some info on the P0306 code:

Possible causes of OBD code P0306
A code P0306 may mean that one or more of the following has happened: Faulty spark plug or wire Faulty coil (pack) Faulty oxygen sensor(s) Faulty fuel injector Burned exhaust valve Faulty catalytic converter(s) Running out of fuel Poor compression Defective computer 

 

Where is the O2 sensor?  I'd like to start with that.

 

 

thanks,

Richard

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

  • Admin

:welcome:

 

The O2 sensor would be the last thing you would change.

If it was the O2 sensor then all of the cylinders on that bank would also have faults.

 

Cayenne's have a history of troublesome ignition coils. Porsche has updated them several times. Do the tests for cracks and resistance and if more than one is suspect replace them all with the latest version.

Link to post
Share on other sites
  • Solution

P0306 is misfire on Cylinder 6, Bank 2 ( engine's left side, second cylinder back from front of engine.)

If the coil connector is loose, you can get misfire. The mis-fire causes the O2 sensor to get 'bad exhaust' out of the cylinder and causes the fault code for mixture before primary catalytic converter 'bank 2'.

If the connector on the coil is secure, and if the coil is okay, ( and if the spark plug is okay... probably) then the mis-fire could be caused by a vacuum leak on cylinder 6. I believe the air plenum is removed to change the thermostat. It's been known to happen that the gasket between the air plenum and the head can fall out of place as the air plenum is lowered in place... or the gasket can catch on the clips of the fuel injectors as the air plenum is lowered in place.. and tear the gasket. Either of these would allow an air leak/vacuum leak.

The description written in the lead of the thread for 0306 doesn't fit P0306.

The fault code involving valve lift for cylinder 6 doesn't fit the pattern of the other 2. Could the description associated with 1352 be incorrect too?

Check for ignition problem or vacuum leak.. fix it and then clear the codes and try it to see if anything returns.

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.

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.