bigbuzuki

Possible Terminal 15 issues due to corroded splices.

Check out the link below for possible solution.

https://www.renntech.org/topic/30560-critical-electrical-system-faults/?do=findComment&comment=172980

Known issue for older PCMs.

No fix as yet.

See attachment for info.

You can also remove the MOST plug from the DVD and set the date, but the date will reset to the wrong date when you plug the MOST connector back into the DVD and the system receives the GPS signal again.

ATI 9 1904 PCM2.1 GPS-Generated Date and Time Are Not Reliable From April 2019.pdf

Front brake disc rotor replacement cost is brutal.

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 

and

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.

Could it be a worn wheel bearing?

On 11/18/2020 at 9:10 AM, Tecchie said:

@Rick150 What are the wires running to the upper vent outlets?  My center vent is needing of replacement as the previous owner had something installed and broke all the clips.  Any advice?

Wires are for background lighting.

Thud could be centre bearing carrier for the rear cardon shaft.

Whistle may be evident if your aircon servo flaps are closed. Try opening them by turning on the fan and having air flowing to the outlets.

Good to hear.

What was the reason you had the camshaft covers removed?

Good to hear you were able to "bend back" the finger.

Do you have a scan tool handy in order to measure the #2 camshaft angle to confirm?

Was your replacement actuator the same part number as the off going part ?

If I recall correctly, there was a control module change requirement when the transfer case actuator was replaced with an updated part number.

Yes, there is only one hydraulic chain tensioner for your Cayenne S 4.5.

It is item 6 on the attached parts list.

Put it in 3rd gear and do a full throttle sprint.

You should see the boost gauge read 0.8.

The boost / temp sensor located on top of the intake manifold just in front of the throttle valve is the sensor responsible for sensing boost.

Read through this link.

Control lines down to the wastegate actuators do crack / split preventing these actuators from opening resulting in overboost condition.

N75 valve and boost sensor on the top of the manifold are also in the loop and are possible suspects.

Below post is the troubleshooting guide for P0234.

What code are you getting for the overboost?

The thing on the bumper looks like some sort of radar jammer / light assembly item.

I am not getting any ECU faults appearing with my dubious cam readings on bank 2 via Durametric.

Car is running well with full boost.

Any ideas?

2003 CTT - 260,000km

The oil cooler indeed is water cooled.

I had my oil heat exchanger changed on my 2003 Cayenne turbo last December as it was cracked with oil found in the coolant system.

Change it asap.

Part number for the S and turbo is the same being 948 107 276 03.

That would be the fuel rail bleed screw cap.

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.

The plastic key won’t switch the battery source from front to rear.

You need to use the metal blade key to enable the switchover from front to rear auxiliary battery.

If your not driving through rivers or the like and you want a long term solution, remove the plug permanently.

With a 2004 CTT, you may have aged vacuum lines that are leaking which can cause idle issues.

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.

The transmission front seal is a common source for transmission fluid leaks. The seal can be damaged if leaking coolant fluid gets to the seal.

Did you repair the transmission fluid leak from the chaffed pipe that you mention in your original post?