absln

I'd be interested in hearing about aftermarket tpms sensors as well. I have a 2005 S

An update to this:- after some troubleshooting it looks like the phone module is causing the random restarts. I took the sim card out and the problem goes away. As soon as I put the sim card back in the random restarts happen. At the time the system restarts it looks like the phone is trying to do something like initialise. Once the system is working phone calls can be made and received fine - till it restarts again.

Anyone seen this particular issue?

Would a loose MOST connection give errors on the screen rather than restart the whole system?

Hi,

The PCM (2.1) on our 2005 Cayenne S keeps restarting whilst driving. This happens when playing a CD or listening to the radio, and I noticed that sometimes when it restarts the trip computer goes to zero as well. I tried the reset code (keys 148) but that doesn't really do anything to fix it.

What is the best way to troubleshoot what is wrong with it?

Thanks

Thanks. Does this adjustment also work for the xenon lights? I think I have the auto levelling ones

Upon doing some more research, apparently there is an 'auto levelling sensor' at the rear of the car that could go faulty and not point the headlights correctly. Anyone have any more information on this sensor and how to troubleshoot it? Any schematics or diagrams would be most helpful.

Cheers

For a while now i've thought our Cayenne's main headlights were too high, and today when I was travelling in a car in front of the Cayenne at night I realised they actually are too high. We have the xenons (litronic?) lights and I think they are meant to be auto levelling. When the car starts the headlights point and down go back up, but they don't change from the up position, and i'm wondering whether the 'levelling sensor' might be at fault? We don't get any warning lights on the dash or anything like that.

Is there anything I can do myself to diagnose what it might be? I've also noticed some covers under the hood which have a picture of lights on them, which i'm assuming might be some sort of adjustment?

Thanks

I have the same issue on mine - going to change the actuator soon (ordered it today).

I still haven't quite figured out how to get the boot right interior panel out (the one around the CD changer)

Hi,

Does anyone have the following manual available?

Workshop Manual ‘443219’ Removing and installing wheel electronics

Thanks

I don't have access to a durametric, although I should invest in one.

Are there any other symptoms for the fuel pump going?

A bit of a weird issue my wife has told me about, so my information may not be totally accurate! A few times whilst accelerating and turning (such as turning in the road or coming out of a parking space) the engine has cut out and the car has required to be restarted. Once restarted it runs fine with no issues, but it's happened a few too many times for it to be something random.

The car is a Cayenne S with TipTronic.

Anyone had any similar issues?

Hi,

My cayenne doesn't have these, and i'm wondering if it's an easy retrofit item that I could install myself. Anyone done this, or have the part numbers/diagrams?

Cheers

I'd like some advice on when to top up oil and how frequently to check it.

My oil level is a couple of mm below max on the stick and i'm wondering whether I should top it up?

Thanks

I did a little experiment today and set all my tyres to 40psi (fronts were 35/36 and back were already 40). I reset the trip computer and it went up to 14-15mpg UK around town - admittedly the engine was already warm. Near our house it went down to 13.5 as it's quite hilly so that is probably another reason why it gets lower. I'm fine with those figures if it's normal, as long as there doesn't seem to be anything going wrong with the vehicle!

Is it ok to leave tyres at 40psi?

I have Contiental Wrangler F1's on my 20" wheels - they're pretty good

Sorry, I should have made that clearer. It's a 2005 4.5 S tiptronic

The mpg's you guys have quoted of 15 and 17-18 - is that US or UK?

I'd like to check whether the fuel consumption on my cayenne is worse than it should be. I took the below picture after driving through the city

12.5 mpg UK equates to about 10.4 mpg US

When we are stuck in traffic i've seen the mpg figure go down to around 10 mpg (8.5pmg US) and on a normal run it averages around 14mpg (11.7mpg US). We don't exactly put our foot down and are reasonably light on the throttle for these measurements.

Do these numbers sound about right? I've read other owners comments about getting between 16-18mpg on these cars and i'm wondering whether ours is underperforming somehow.

Some things i've checked after reading some other threads:-

• Engine doesn't seem to be misfiring - spark plugs and coils were changed 9k miles ago (major service at dealer)
  
• Oil level seems fine (slightly below max)
  
• I don't think any brakes are binding, and car seems to drive fine
  
• Tyre pressures seem fine
  

Are there any other things I can check, and any advice on improving the mpg?

Thanks

Actually, that isn't a picture of a wheel on my car - I didn't have one to hand so googled one to show the type of wheel. I do recall that my wheels have a grey/aluminium type valve cover on them. I'll try and take some pictures.

On another note, would something like a durametric be able to help me identify what part of the TPMS is not working?

This is a pic of my wheel and the valve - does that look like it has sensors?

Thanks mudman - i'll try some tyre shops

Actually, that isn't a picture of a wheel on my car - I didn't have one to hand so googled one to show the type of wheel. I do recall that my wheels have a grey/aluminium type valve cover on them. I'll try and take some pictures.

On another note, would something like a durametric be able to help me identify what part of the TPMS is not working?

If nothing has been altered you'll need to put the vehicle on Porsche scan tool but most common cause is failed batteries in the pressure units.

It had a service 2011 and it says the tyre pressure monitor was checked then. I could take it back, but is there a way I can check the batteries myself? These are the type of wheels on the car (20")

Just started ? changed wheels or tires recently ? model/ year ?

Thats a good question - i've not had the car long so don't know if it was happening before that. The previous owner had turned off TPM so i'm trying to find out whats wrong with it.

Hi,

The tyre pressure monitoring yellow light stays on in the dash, and when you start up it says it's in learning mode. I've tried turning the TPM on and off and then drove for a few days but the light still stays on.

I have read some threads about this, but a bit confused on how I should tackle troubleshooting this. Could someone kindly give me some things to check?

Thanks

Thanks for that - I tried that today and the pin moves freely out when you lock, but nothing happens at all when you unlock. I can't even hear it trying to move the pin back.

Faulty solenoid then?

Is there a how-to on how to access/change it?

I sent you a PM.

Fantastic, Thanks!

Thanks for that - I tried that today and the pin moves freely out when you lock, but nothing happens at all when you unlock. I can't even hear it trying to move the pin back.

Faulty solenoid then?

Is there a how-to on how to access/change it?

Try WD-40 to clean/lube the actuator pin and if that doesn't sort it then replace the unit.

Where would I squirt WD40 exactly? On the pin thats showing, or inside the wheel well where the actuator is?

Hello All,

First Post!

The fuel filler cap on my Cayenne is stuck in the locked position, and I am only able to open it using the rubber release cable inside the rear of the car. I've read some threads about similar issues and think it might be the solenoid actuator that is faulty.

The tailgate and rear window aren't affected, and I get the following behaviour

- Upon locking the car, the actuator shoots the pin out to lock the fuel filler cap, and then goes back about 5mm (still locked though)

- Upon unlocking the car, the actuator does nothing

I've read it could be a fault fuse, but are there different fuses for locking and unlocking the actuator?

Advice appreciated