After taking my wife's 2018 Panamera to our local independent service shop specializing in Porsches, the car checked out fine but they were unable to clear the computer faults and the "Service Necessary" warning persists. They tried different units and make sure the proper upgrades were in effect. Thinking the car's computer might reset after driving a few miles, I then took it home. I then ran a check on the Panamera using my Durametric (Enthusiast) unit that I've used on my 997 and previous Cayenne. Even after clearing the faults they reappear.

The screenshots show the faults on the Durametric report.

Any suggestions? Taking it to the dealer up the road is time consuming and sometimes counterproductive.

 

It's under warranty still? I'd take it to the dealer. Every dealer I've dealt with will supply a loaner vehicle.

 

From the codes and limited info provided, pcm has internal faults. Dealer can do more testing with piwis2. Durametric very limited with any testing.

 

The Durametric website notes 2010-2015 Panamera, so I guess that's why there is a problem. Dealer is probably nearer than me, and mine notes up to '15/'16 models to boot:

http://www.foxwelltech.com/product/item-14.html

 

Learned this recently so I thought I'd update what I know. 2018 may need PIWIS 3, PIWIS 2 would not work. There are aftermarket/clone/hack options available already....

 

How much do piwis2 systems go for, hacked/cloned? Wondering.

 

Since this thread is for a 2018, I found this PIWIS 3 but I have no idea how good it is:

http://www.vxdiagshop.com/wholesale/...stic-tool.html

$2099