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Service bulletin No. 11-25

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 id11016723
Published by NHTSA2025-04-07
Manufacturer's numberNo. 11-25
Manufacturer's date2025-03-28
NHTSA componentLANE DEPARTURE: WARNING; ELECTRICAL SYSTEM; LANE DEPARTURE: ASSIST

NHTSA's summary

Technical Information - Various Error Messages regarding Driver Assistance Systems in the Instrument Cluster / Passive Fault Memory Entry "C12D5FA" in the Driver Assistance System Control Unit (ZFAS) (11/25)

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

Driver assistance, Electrical system, Lane departure and lane keeping

Trouble codes named

C12D5

Vehicles listed
PORSCHE 9112019, 2020, 2021, 2022, 2023, 2024, 2025
PORSCHE CAYENNE2019, 2020, 2021, 2022, 2023, 2024, 2025
PORSCHE PANAMERA2019, 2020, 2021, 2022, 2023, 2024
PORSCHE TAYCAN2020, 2021, 2022, 2023, 2024, 2025

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. 11-25-42026-09-04. Service bulletin. Technical Information for White Messages Regarding Driver Assistance Systems in Conjunction with Passive Fault Memory Entries in the ZFAS Control Unit
No. 75-252026-09-04. Service bulletin. Technical Information for Various White Messages Regarding Driver Assistance Systems/Fault Memory Entry "C12D5FA" in the ZFAS Control Unit
No. 24-262026-04-07. Service bulletin. Symptom based workshop manual for a Message “Active Lane Keeping Currently Not Available”, Fault in Front Driver’s Side Door Control Unit “U14B700” in Distance Measuring Sensor (ACC) Control Unit
No. 11-252026-01-06. Service bulletin. Technical information for Various Error Messages Regarding Driver Assistance Systems in the Instrument Cluster in Conjunction With Passive Fault Memory Entries in the Driver Assistance Systems Control Unit - ZFAS
No. 75-25-22025-12-05. Service bulletin. Technical information for Various White Messages Regarding Driver Assistance Systems In the Instrument Cluster/Fault Memory Entry "C12D5FA" In the Control Unit for Driver Assistance Systems
No. 75-25-12025-12-05. Service bulletin. Technical information for Various White Messages Regarding Driver Assistance Systems In the Instrument Cluster/Fault Memory Entry "C12D5FA" In the Control Unit for Driver Assistance Systems
No. 75-252025-12-05. Service bulletin. Technical information for Various White Messages Regarding Driver Assistance Systems In the Instrument Cluster/Fault Memory Entry "C12D5FA" In the Control Unit for Driver Assistance Systems
No. 2503.32025-12-05. Service bulletin. Instructions on advanced technical information for Troubleshooting Advanced Driver Assistance Systems (ADAS)
No. 2503.22025-08-06. Service bulletin. Instructions on advanced technical information for troubleshooting ADAs systems
No. 2503.12025-07-09. Service bulletin. Instructions on advanced technical information for the advanced driver assistance systems. Please refer to PDF attached for more information regarding this.