poleposition

One more thing, about a fuse.

I need to disconnect the PCM, navigation, cd, radio etc... the whole thing... is there a fuse for this ?

PLease, i need to do this today.

The guy from the service, told me that after the car is shut, the pcm comes to life, some strange activities are occurring, like a cd is being rotated etc... and that is what is draining the bat.

We need to check this, so i must know were the fuse is...

That's odd! I thought it's the otherway around! I have a BOSE Sub in the back AND I have a 2nd battery. I had to buy a spare to bring along when I take a long trip just in case.

ManN

I too have seen a Cayenne with the Bose sub over the second battery.

Ok, just removed the SUB, and there is no aux battery on my car.

Thank you.

Still... I do not understand the purpose of the Auxiliary Battery.

What year is your vehicle? There was a problem with the positive battery cable from the alternator to the battery on early models.

Could you please detail on that ? Were is that cable exactly ?

It is doing it again, now with the 3rd new battery.

With the car shut down, after about 15 minutes, the consumption is 0.4 something like that if i remember correctly.

So it could be that cable you mentioned.

I was reading on the web that Tuareg owners are also complaining about mysterious battery discharge.

After I bought my Cayenne Turbo, and reading about this issue on this board, I had them changed a year ago.

Maybe they did so... Anyways, I will pick it up Monday, and see for myself.

UPDATE:

Just got a call from the garage:

They told me the emissions are now perfect, what they've done was, and i quote "a reset/self cleaning procedure on the lambda probes", and all is fine now. And of course the car passed the MOT.

Do you have any idea what that means ?

update

The car was serviced only at Porsche Dealer, no major repairs, before this MOT, everything was fine.. well, i've noticed a bit of smoke when the engine was cold, but that was it.

Head-gasket is ok, coolant level ok.

They mentioned a few hours ago the lambda probes, but this morning they said they were ok. Sorry, it is 9PM here :)

So they can't give me an answer for the 4.7 MPG fuel consumption... or could this be from the lambdas ?

I hope they will give me some error codes for me to post.

Thanks.

The CEL was on, but due to a bad wire on a coil, so now it is off, still the problem remains.

If there were the lambdas, the CEL would light up right ?

I don't understand how it can be off, with all that smoke !

Happy new year guys, please advise on the following,

The car is now at the dealer, with the following serious issues:

1. Huge Fuel Consumption (avg 50 liters / 100 KM) - 4.7 MPG

2. Extremely high emissions on the exhaust, like 10 times more than normal, plus smoke. White/bluish smoke.

They are not sure what it is, the car has been there for 2 weeks, please give me something to tell them at least... they are so incompetent, it is unbelievable.

I was supposed to renew the MOT, but with these emissions, there is NO WAY !

What could it be ?

So far, the coils and sparks turned out OK, whatever else they verified they said it checked ok... still the smoke, high emissions and 4.7 MPG.

Do not drive the vehicle if the check engine light is flashing. You really need to find the cause of your faults.

Of course, it says so in the manual, but in my case, the CE is not flashing.

Update, still haven't found the time to check the fault code.

BUT:

The idle vibration disappeared, everything runs ok.

Still the CE light remained on...

Maybe bad gasoline ? <_<

Last night, out of the blue my 2004 Cayenne Turbo, decided to light up the Check Engine, right after I've noticed a strange vibration and shaking of the engine at Idle speed. :lightbulb:

Also, that shaking is present when the car is moving off in D, without acceleration.

When driving normally, everything works fine, acceleration etc. Just when engine is idling, it shakes strangely.

Did this ever happened to someone else ?

@StealthTT, if you are reading this, I will give you a call next week, and maybe, if you have some spare time, we can check this with your tester :)

&, how do I find out what version of PCM I have?

If you press the MAIN and TRIP buttons at the same time, the version number will show on the PCM screen, as well as other information regarding software version etc.

One being a turbo and one aspirated, there will be many differences I believe. Pistons, camshaft, crankshaft etc....

Maybe it is a long shot, but is your Xenon installation OEM ? A friend of mine had the same problem, and the issue came from the aftermarket xenon installation...

Also, do you have the DRL option activated ? Daytime Running Lights.

I confirm, I had one of them changed last winter.

BTW, if the aluminum trim becomes deteriorated, you have to change the whole molding thing :) This is why I changed mine... You cannot order just the trim.

I am sure it is OEM, on the connector, there is the Audi & VW emblem, and some part number I guess. As we know, Porsche uses a lot of Audi and VW components... so I am sure it is OEM.

Very very strange.

So nobody wants to try cleaning the throttle body to see if that helps the problem??

In one of my previous posts, I mentioned having the same problem.

I've followed vivicary's advise and had the throttle body cleaned at the dealer a few months ago.

Sub Idle, disappeared. :thankyou:

Nobody ? :unsure:

This morning, I have noticed a loose cable on my Cayenne Turbo.

Located under the panel that covers the Fuse Box in the engine compartment, near the Brake Fluid Can.

It looks like the one in the picture below, the multi pin connector is not connected to anything, just hangs there. I cannot see where the other end goes.

What could it be ?

Ok, another thing... is there a saparate fuse for the alarm system ? I mean, one that de-activates the perimetre/ir sensor etc ?

And where is the horn for the alarm ? when it sets off, only the signals work, not the acoustics... i need to locate the horn.

OK, thank you again !