I stored my 2007 997.1 Turbo in a storage unit before the Hurricane Dorian last month. It had no power and I couldn't use my Battery maintainer. Just went to get it out this morning and of course it would not start. I was able to jump start the car and drove it back home. 2 things I noticed were:
-The navigation screen (map) would not come on. The message on the screen said "navigation is loading" and showed a bar chart with 1 out of 5 bars showing. It would also show on the screen "please put in the navigation cd". I have heard that these cars are sensitive to a low battery. Could that be the issue.
- Also the Left rear tire was low - put air in it when I got home and the screen showed all 4 tires were at proper air pressure but the tire pressure warning light stays on. Does the car have to be driven to reset the tire pressure warning light.
Thanks for any advice or suggestions guys!!

 

Can’t speak to the Nav system, but low battery will affect the systems. On the TPMS go into the settings and select Set and have the system relearn the current pressures and the light should go off once learning is complete.
as a rule jump start can be “hard” on sensitive systems, always better to put the battery on charge or pull it and have it recharged then put it back and start the car. If the battery went dead that fast I’d venture to guess it has a bad cell and needs to be replaced.

 

Thanks for the reply!!

 

Just put in a new battery and Tire pressure warning reset itself.These are the messages that I'm getting on the Navigation screen. Thanks for any help or advice!!



I never removed the Navigation DVD!

This screen shows the location where the car was purchased in 2007.

 

Have you tried removing and reinstalling the DVD? Worst case run by dealer the service guys maybe able to take a look without an official service call.