what kinds of errors are ussually in 928 gt diff? in the display appears a diff picture.

thanks

 

You will be talking about 90+ cars.
This is a PSD fault, meaning the system isnt working.

It is possible that the pump has failed, or that the system just needs to be flushed out.
But hooking it up to a spanner will give you the most info.

 

Thanks Colin.