Need some help Porsche Doctor

Porsche Doctor do you have any idea's on why I would only have 12 volts with the car running, shouldn't you have 14?
 
Charlie

Where are you checking, accross the battery? Did you check the engine ground strap?

Yup, start by checking your battery cables and grounds.  Clean all the terminals at the battery, block, starter, and alternator.  If that doesn't help,  I would look at your voltage regulator.