[Madmax08154711]

In addtition i found the following.



1999 Porsche Boxster OBDii connector pinout
Pin # OBD-II Purpose Porsche Specific Wire Color Notes
1 - power black/red max 5 Amps
2 - - -
3 - K line #2 orange/blue
4 chassis ground - -
5 sensor 0 volts - brown/blue do not use as a ground
6 - - -
7 ISO 9141-2 K line - orange/black
8 - - -
9 - TN signal violet/green tach wire, 12v square wave
10 - - -
11 - - blue/black
12 - sensor voltage red/yellow/black 5v sensor power
13 - - -
14 - - -
15 ISO 9141-2 L line - red/yellow
16 unswitched power - red/black max 5 Amps

So the question is was about the OBD2 Pin 12 (sensor voltage)