Check a VIN

May 5, 2026 Service bulletin

Technical information on Transmission Warning Message “P Not Available”, Fault Memory Entries for Parking...

Porsche technical service bulletin No. 28-26 for 2020-2026 Porsche 911.

Bulletin number
No. 28-26
Component
Electrical system
Summary
Technical information on Transmission Warning Message “P Not Available”, Fault Memory Entries for Parking Lock Buttons in the Shift Console and Transmission Electronics (PDK) Control Units (

Owners of these vehicles have filed 6 complaints in the electrical category.

Vehicles covered

VIN decoder

See the problems and recalls for an exact car

Buying a used Porsche 911?

Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.

Check its history