New owner couple questions (TPMS, Air Bag Fault)

[Greenmachine]

Recently purchased a 2004 Cayenne S and other than a couple of issues, I am extremely pleased with the vehicle. I looked through the TSB's and read the one on trouble shooting the TPMS and tried to read all the posts on the TPMS in the forums. Mine is showing lines instead of pressures and saying that the Monitoring is off system is learning. It stays on this pretty much all the time. I have turned it on and off several times to no avail. I am guessing that the batteries in the sensors at the wheel are likely dead. I would ordinarily just leave it off but instead of a spare tire I got the Bose box where it should be. Doing some research it looks like these sensors run anywhere from 80-125 and are apparently not serviceable (ie batt change). Is this the likely problem being the care is 6 years old? Is there a way to check and see if they are transmitting?

The airbag fault was traced to the connector under the seat by the previous owner. It's obviously out of warranty but we have a few local Indy shops that specialize in Porsche and they tracked it down for him. I found this, but I don't know that my local dealer will fix it without a warranty (doubtful since I purchased it from an individual)Air bag light Porsche Cayenne .

The only other weird bit is that one of my keys overspins the starter (starter spins after engine is started for a second). One key works fine and I have never seen or heard about anything like it before.

Thanks

[wvicary]

Welcome to the forum. You need the porsche system tester to accurately diagnose the TPMS and chances are the pressure sensors are dead or missing completely. Before replacing anything with the air bag system, have the connections cleaned with a quality electrical contact cleaner, reset the codes and monitor.

Sorry but I have never heard of any faults like you're having with the ignition key.

[woodslayer]

Recently purchased a 2004 Cayenne S and other than a couple of issues, I am extremely pleased with the vehicle. I looked through the TSB's and read the one on trouble shooting the TPMS and tried to read all the posts on the TPMS in the forums. Mine is showing lines instead of pressures and saying that the Monitoring is off system is learning. It stays on this pretty much all the time. I have turned it on and off several times to no avail. I am guessing that the batteries in the sensors at the wheel are likely dead. I would ordinarily just leave it off but instead of a spare tire I got the Bose box where it should be. Doing some research it looks like these sensors run anywhere from 80-125 and are apparently not serviceable (ie batt change). Is this the likely problem being the care is 6 years old? Is there a way to check and see if they are transmitting?

The airbag fault was traced to the connector under the seat by the previous owner. It's obviously out of warranty but we have a few local Indy shops that specialize in Porsche and they tracked it down for him. I found this, but I don't know that my local dealer will fix it without a warranty (doubtful since I purchased it from an individual)Air bag light Porsche Cayenne .

The only other weird bit is that one of my keys overspins the starter (starter spins after engine is started for a second). One key works fine and I have never seen or heard about anything like it before.

Thanks

there was a problem with the 2004 keys when they first came out. It is a problem with the programing in the key fob. you may have a bad fob. does this happen everytime you try to start the car? if you receive excellence, there is a great article on the 03-06 cayenne that will tell all the stuff you need to know... the starter is very expensive to repalace. if the key fob is causing this i would replace the key or not use. the cost of the fob with old key installed is nothing compared to a starter.