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Service bulletin No. 28-26

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11033369
Published by NHTSA2026-06-03
Manufacturer's numberNo. 28-26
Manufacturer's date2026-05-05
NHTSA componentELECTRICAL SYSTEM

NHTSA's 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 (

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Vehicles listed
PORSCHE 9112020, 2021, 2022, 2023, 2024, 2025, 2026

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
No. 86-262026-10-02. Service bulletin. Technical Information for Vehicle Color in Front Display/Control Panel Wrong after Replacing Central Computer (PCM)
No. 12-262026-10-02. Service bulletin. Technical Information for Damage to Nano Plug Contacts Due to Utilization of Incorrect Measuring Equipment
No. 43-262026-10-02. Warranty extension. Technical Information for Warranty Extension for Front Door Wiring Harness related to Real Top View (RTV) issues
No. 2109-32026-09-04. Service bulletin. Information on Advanced Technical Information for Critical 12V Li-ion Battery Recycling
No. 65-262026-09-04. Service bulletin. Technical Information for Horizontal Stripes in Front Control Panel/Central Display (PCM)
GR13D7972026-08-05. Service bulletin. Parts Withdrawal - Steering Column Switch
GR13D7942026-08-05. Service bulletin. Parts Withdrawal - Various Parts
ASB22026-08-05. Service campaign. Re-Programming Assistance System Control Unit (Stop Delivery/Recall Campaign)
2229.122026-08-05. Service bulletin. ConBox Current Draw Discharges 12 V Battery
GR13D7902026-07-08. Other. Parts Withdrawal - Various Parts