Four wheel drive system fault, PSM failure, Lock overloaded

[danish]

Yesterday, when I returned from a drive of about 30 minutes, I saw the Four Wheel Drive system Faulty message on the display.  After about couple of hours, I started the car and the warning showed up again.  I took it for a 5 minute drive, turned off, restarted it and the warning showed up again, decided to drive it back home, but it was a bit jerky when it started moving from rest and then gave PSM failure warning and then Lock overloaded warning.  Was able to drive it home without any more jerkiness.

I doubt that it is battery related but will have it checked.

One thing I noticed is that the front  tires are worn from sides only as the front LCA need to be replaced.  Could these cause these warnings?  Or is something else going on?

 

thanks

[Loren]

I've seen something as simple as worn tires cause faults like that - so start with the easy stuff.

If you have Durametric (or access to a PIWIS tester) check for fault codes that may help narrow down the issue(s).

[danish]

Thank you Loren.  I am going to replace tires tomorrow and ordering LCA for both sides and will have the codes checked at the local dealer.

 

Do you know if 2009 Cayenne Turbo S LCA will work in 955 Cayenne S?

[Loren]

They have different part numbers - sorry, I do not know why.

You might have to compare them at a dealer.

[danish]

Got it.  Will report back after comparing them.

[danish]

I replaced left and right front LCAs.  The warnings disappears after a few days.  But I am wondering if this has anything to do with transfer control motor and control unit.  Will have it analyzed at the dealer on Tuesday, but wanted to get my homework done.

 

People mentioned in some older posts that there is a TSB (no TSB number mentioned) for Transfer Case Control motor and the module.  When I called the dealer, they said they are not aware of such TSB.

 

Anyway to confirm if there is a TSB for this?  Or any reference to such with TSB number?