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B200FF9 — Control unit, faulty

Control unit, faulty. The Taycan, 911 (992), Panamera (971), Panamera (972) and Cayenne report this code; below is which control unit sets it on each model and how to read and clear it.

Which models and control units set B200FF9

Porsche Taycan

Lane Change Assist 2Front Corner Radar 1Front Corner Radar 2Front Assist CameraLane Change Assist

Porsche 911 (992)

SWA2 (Spurwechselassistent 2)ZFAS (Zentrales Fahrer Assistenz System)SWA (Spurwechselassistent)

Porsche Panamera (971, 2017–2023)

SWA2 (Spurwechselassistent 2)BVS (Bildverarbeitungssystem)SWA (Spurwechselassistent)

Porsche Panamera (972, 2024–)

MRR_HL (Radar HL)MRR_VR (Radar VR)MRR_VL (Radar VL)ZFAS (Zentrales Fahrer Assistenz System)MRR_HR (Radar HR)

Porsche Cayenne (9YA)

SWA2 (Spurwechselassistent 2)MRR_VR (Radar VR)MRR_VL (Radar VL)ZFAS (Zentrales Fahrer Assistenz System)Image Processing ElectronicsSWA (Spurwechselassistent)

How to read and clear B200FF9

  1. Plug a standard ENET (Ethernet-to-OBD) cable into your Porsche's OBD port and your Mac or Windows PC.
  2. Open STEUER14, pick your car and run a fault scan: every control unit is read, and B200FF9 shows with its status, its full description and the freeze frame when the unit stores one.
  3. Fix the cause first, then clear the fault memory and scan again to check it stays away. Reading and clearing fault codes is free on every control unit.

More about fault memory in the manual →

Download STEUER14 — free fault reading

Other codes of the Lane Change Assist 2

B200FF1Control unit – function restriction
B200FF2Internal malfunction
B200FF3Internal malfunction
B200FF4Internal malfunction
B200FF5Internal malfunction
B200FF6Internal malfunction
B201000Calibration
B201200Coding
B202200Function limitation due to environmental influences
C10A700Rolling test mode active
C10C200Function restriction
C1114F0Lane change assistance control module, Automatic calibration not possible

All 49 codes of this control unit →

Fault names come from the manufacturer's diagnostic data. STEUER14 is independent and not affiliated with Porsche AG. A code tells you what a control unit detected, not always which part failed — check wiring, supply voltage and related codes before replacing parts. STEUER14 shows each fault's full description, status and freeze frame on the car.