# Service bulletin No. 205\-21\-2

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.

- Type: Service bulletin
- NHTSA id: 10208619
- Published by NHTSA: 2022\-03\-03
- Manufacturer's number: No. 205\-21\-2
- Manufacturer's date: 2022\-02\-14
- NHTSA component: LANE DEPARTURE: ASSIST; LANE DEPARTURE:SOFTWARE; ELECTRICAL SYSTEM

## NHTSA's summary

Technical information for a message stating "lane change assist not available \- service necessary" in the instrument cluster. Re\-programing control units for lane change and front corner radar.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10208619-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10208619-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Driver assistance, Electrical system, Lane departure and lane keeping

## Vehicles listed

- 2020 to 2021 PORSCHE TAYCAN

## Other bulletins for the same vehicles and component

- [No. 11\-25\-4](/bulletins/11037046.md), 2026-09-04, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS; LANE DEPARTURE: ASSIST; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING. Technical Information for White Messages Regarding Driver Assistance Systems in Conjunction with Passive Fault Memory Entries in the ZFAS Control Unit
- [No. 11\-25](/bulletins/11027134.md), 2026-01-06, Service bulletin: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; LANE DEPARTURE: ASSIST; LANE DEPARTURE: WARNING; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; FORWARD COLLISION AVOIDANCE: WARNINGS. 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](/bulletins/11026409.md), 2025-12-05, Service bulletin: LANE DEPARTURE: WARNING; LANE DEPARTURE: ASSIST; FORWARD COLLISION AVOIDANCE: WARNINGS; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. 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. 2503.3](/bulletins/11026391.md), 2025-12-05, Service bulletin: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; LANE DEPARTURE: ASSIST. Instructions on advanced technical information for Troubleshooting Advanced Driver Assistance Systems \(ADAS\)
- [No. 2503.2](/bulletins/11021643.md), 2025-08-06, Service bulletin: LANE DEPARTURE: WARNING; LANE DEPARTURE: ASSIST; FORWARD COLLISION AVOIDANCE: WARNINGS; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Instructions on advanced technical information for troubleshooting ADAs systems
- [No. 2503.1](/bulletins/11020513.md), 2025-07-09, Service bulletin: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; LANE DEPARTURE: WARNING; LANE DEPARTURE: ASSIST; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING. Instructions on advanced technical information for the advanced driver assistance systems. Please refer to PDF attached for more information regarding this.
- [No. 11\-25](/bulletins/11016723.md), 2025-04-07, Service bulletin: LANE DEPARTURE: WARNING; ELECTRICAL SYSTEM; LANE DEPARTURE: ASSIST. 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 \(ZFAS\) \(11/25\)

JSON: [/v1/bulletins/10208619](/v1/bulletins/10208619)

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