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Posts posted by bigbuzuki

  1. On 3/20/2021 at 11:07 AM, Silver_TT said:

    I agree with Loren. 


    You asked if it was a fuel injector issue (I didn't realize the 2004 Cayenne Turbo was DFI but I checked and it looks like it is).  I have seen the exact codes you have caused due to a bad injector (and it was also at idle).


    Different engine but it had two codes:

    1) a P030300 - Cyl.3 Misfire Detected 


    2) P030000 - Random/Multiple Cylinder Misfire Detected


    Replacing the injector fixed the issue.  Not telling you to throw parts at it, just a FYI data point for you.

    It is not DFI.

    The 4.5 litre engines are port injected.

    The 4.8 litre engines are Direct Fuel Injection.

  2. The burnt contacts are a result of poor contact with the receptacle socket.

    The solution is to modify the plastic headlight plug holding bracket on the vehicle side.

    You cut off the ends of the retaining bracket with a Dremel allowing the electrical plug to be free from the holding bracket.

    You then manually insert the plug into the headlight upon installation and manually remove it when you remove the headlight.

    I modified mine 8 years ago and have never had a problem again with the turn signal or any other type of headlight message.

  3. I too have a 2003 CTT and have had my reservoir tank split at the seams every 90,000 km on average.


    If you haven’t replaced your reservoir tank yet, there is a good chance the reservoir is the source of your leak.


    The plastic coolant Ts were rupturing every 90,000 km as well.


    I’ve replaced the Ts with stainless hoping not to have them fail again.


    There is also the electric coolant pump for turbo oil cooling when engine is turned off that could possibly be leaking. It is situated in the wheel well. Mine has not leaked as yet.

  4. In your case with the metal dummy key substitute, ops would be the same as if your using the Porsche remote security metal key, the cranking power coming from the rear battery.


    You need a plastic dummy key to have crank power from the front battery.


    I am assuming that the sensing of metal versus plastic inserted into the ignition slot is how the system differentiates between the keys and which battery crank source to use.


    Have you checked the electrolyte levels and measured the specific gravity of the cell batteries?



  5. Replace the the front battery initially as its 5 years of age.


    There is no battery registration feature on your Cayenne.


    Front and rear batteries are different capacities with the larger capacity in the front position.


    Do not swap battery positions.


    If your car is optioned with KESSY and you use the plastic dummy key to start the car, the front battery is used for cranking.


    If you don’t use the plastic dummy key, the cranking operation is via the rear battery.

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