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Thanks for your input. Found a shop that I just took it to. You were correct it is the servo motor. However, they said I do not need to replace the ECU, that is still good. As far as what I thought was a minor issue with the system key faulty, turns out to be a bigger issue. He said my ignition switch is faulty and I have to get a new one. He said it has to be brand new due to the key programming. Can you confirm if this is true? He told me the ignition switch is almost a $600 part but I found new ones online for nearly half of that price. He said when he orders it would come with everything including the sensors. Maybe that is why such a drastic difference? He is going to check into it for me more tomorrow and give me the part number and the exact price. I'll update once I find out...
Great, thanks for the info! Definitely sounds like the issue I am having. So, from what I understand I can use the transfer case servo motor in the same year Touareg such as http://www.rockauto.com/en/moreinfo.php?pk=6326826&cc=1427228&jsn=378 or http://www.rockauto.com/en/moreinfo.php?pk=8019336&cc=1427228&jsn=379&jsn=379? I would want to replace the ECU as well. And this would work? http://www.ebay.com/itm/2004-05-06-PORSCHE-CAYENNE-3-2-V6-TRANSFER-CASE-ECU-COMPUTER-CONTROL-UNIT-/232066304551?hash=item36083aca27:g:2WcAAOxyOalTbVPL&vxp=mtr Sorry, to you this may seem simple. But, to me it is not. Hope you understand. I'm just a girl with a crying Porsche trying to get it fixed..
Hello, Any help on this would be appreciated. Thanks in advance. This is my first post and I will try to be as specific as I can. SORRY if it seems long. I have a base model cayenne 2004 with 89,000 miles. I have always been good about the upkeep... Just changed oil, oil and air filter 2 days ago. For a few months now I have been getting the 4WD system faulty and the PSM failure workshop codes. The codes usually do not come up right away upon starting the car. They pretty much always come up in the middle of a drive at various speeds. I could be on the highway or at city speeds. The codes ALWAYS come up together, which makes me think they could be related? 4WD first and then PSM immediately after. (The 4WD definitely works however. I just moved from Minnesota and drove through the mountains in Denver with the car. I had no issues with the car losing traction. It honestly plowed through the ice and snow like a boss!) The small icon on the dash will also stay lit (a triangle with exclamation point in middle with circle arrow around it.) Next time I go to start the car it is gone. I have not noticed any problems with the car while driving. To me it seems perfectly fine and drives the same the first day I bought it. I looked at the previous forums on this problem but I never saw an actual solution? The guy just gave up and sold it. Other users mentioned it could be the battery. I just had my battery checked and was told it is still good. My FM transmitter also checks the voltage every time I plug it in (basically every time I drive) and always says the voltage is normal. I took it to a mechanic and he said it would have to be diagnosed by the Porsche dealership. He told me this because he said he does not want to waste my time and suspect the wrong part to replace if that is not really the issue. He said it is really hard to diagnose these cars without the bench only the dealership has. He did give me the exact codes which I can list later once I grab the paper from the glovebox. So basically, he got the codes for me and gave me some more transmission fluid which he said was a little low. He cleared the codes for me and charged me $75 dollars. Seems stupid considering I still have the issue and now have to go to the dealership next Friday to get proper diagnosis. But, at least he did not charge me original diagnosis for $145... Anyways, the codes are still coming up after the guy cleared them. Let me know if you have any input on the situation or if you could link a similar forum where the user listed the solution that would be fine as well. SIDE NOTE: I am also receiving the message system key faulty. My mechanic in Minnesota said that was simply due to the weight of the key in the ignition moving around. He said it was no big deal and does not affect the car mechanically. The previous owner bought 2 new key fobs about 1 year ago. This happens with both keys. I have one with a lanyard and keychain on it that I use regularly and the other is just the fob itself. Can anyone confirm that this is true? I know it seems small but it is kind of annoying to hear it pop up often. I'm sure the dealership will give me the info I need and I can update this post after the diagnosis Friday. If any of you smart Porsche pals can point me in the right direction before the appointment I can at least prepare myself for what I'm getting into lol.