gbstu

Hi,

I have a 05 Cayenne Turbo. If i leave the car for more than a week there's a good chance i will not be able to start it due to a low battery.

I've changed the battery a couple of weeks ago and i still have the problem after being fully charged.

I ran a diagnostic through the durametric software and pulled up one failure:

GATEWAY Module
15503
Display CAN
No signal/communication

Do you think this failure could be the issue?

Thx, Stu

renaissance.man

I have seen a similar Durametric error before from the GW, however, I do not have the error message.

I doubt that is the problem.

Normally with these battery drain sort of issues, the first step is to disconnect ANYTHING aftermarket. Car chargers, radar detectors, aftermarket HU.

Konstantin

batterie is old.When it gets colder it will not work any more.Mine starts even after 2 months seating in the garage. Unfortunatelly I have other problems . check Cayenne turbo dont shift!

gbstu

How can i find out what a 15503 failure code means....or an code for that matter?
Thx, Stu

911SLOW

15503 is not a valid Porsche fault code.

If the battery is replaced, both numbers (battery size and battery manufacturer ) must be entered in the gateway control unit under: Gateway/Maintenance, repairs/Change battery.
This could explain the No signal CAN message, but it won't explain the drain issue.

Best,