Home › Fault codes › B2F0900

B2F0900 — Development code 9

Development code 9. 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 B2F0900

Porsche Taycan

Aerodynamics Control UnitOn-Board ChargerCentral ElectricsDigital Matrix Light UnitFront Assist CameraLaser ScannerSteering AssistSteering Column Electronics

Porsche 911 (992)

Aerodynamics Control UnitBattery Energy Control ModuleBCM1 (Body Control Module 1)Control Unit Digital Matrix Light (ZDML)ZFAS (Zentrales Fahrer Assistenz System)Steering AssistSteering Column Electronics

Porsche Panamera (971, 2017–2023)

Aerodynamics Control UnitOn-Board ChargerBattery Energy Control ModuleBCM1 (Body Control Module 1)LCM_L (Lichtsteuerung links)LCM_R (Lichtsteuerung rechts)Steering AssistSteering Column Electronics

Porsche Panamera (972, 2024–)

Aerodynamics Control UnitOn-Board ChargerBattery Energy Control ModuleBCM1 (Body Control Module 1)Control Unit Digital Matrix Light (ZDML)ZFAS (Zentrales Fahrer Assistenz System)Steering AssistSteering Column Electronics

Porsche Cayenne (9YA)

Aerodynamics Control UnitOn-Board ChargerBattery Energy Control ModuleBCM1 (Body Control Module 1)Control Unit Digital Matrix Light (ZDML)ZFAS (Zentrales Fahrer Assistenz System)LCM_L (Lichtsteuerung links)LCM_R (Lichtsteuerung rechts)Steering AssistSteering Column Electronics

How to read and clear B2F0900

  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 B2F0900 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 Aerodynamics Control Unit

B2F0300Development code 3
B2F0400Development code 4
B2F0500Development code 5
B2F0600Development code 6
B2F0700Development code 7
B2F0800Development code 8
B2F0A00Development code 10
C10A700Rolling test mode active
C10EE00Rolling test mode - fault
C114101Terminal 30 – defective
C114201Terminal 31 – defective
C115811Temperature sensor for convertible top hydraulic pump – short circuit to ground

All 305 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.