Home › Fault codes › B2009F0

B2009F0 — Function restriction, temperature - below limit value

Function restriction, temperature - below limit value. 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 B2009F0

Porsche Taycan

On-Board Charger 2On-Board ChargerInstrument ClusterFront Assist CameraInformation Control UnitLaser ScannerOTA Function Control UnitSound SystemTelematics Communication Unit

Porsche 911 (992)

Kombi LGPADM (Dynamische Aggregatelagerung)Lift VA (Lift Vorderachse)ZFAS (Zentrales Fahrer Assistenz System)MIB2 (Zentralrechner)Rear Axle SteeringDSP (Audioverstaerker)Telematics Communication UnitVTS (Diebstahlverfolgungssystem)

Porsche Panamera (971, 2017–2023)

On-Board ChargerMIB2 (Zentralrechner)DVD WechslerDSP (Audioverstaerker)Telematics Communication UnitTV TunerVTS (Diebstahlverfolgungssystem)

Porsche Panamera (972, 2024–)

On-Board ChargerKombi LGZFAS (Zentrales Fahrer Assistenz System)MIB3 (Zentralrechner)DSP (Audioverstaerker)Telematics Communication Unit

Porsche Cayenne (9YA)

On-Board ChargerKombiZFAS (Zentrales Fahrer Assistenz System)MIB2 (Zentralrechner)DVD WechslerDSP (Audioverstaerker)Telematics Communication UnitVTS (Diebstahlverfolgungssystem)

How to read and clear B2009F0

  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 B2009F0 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 On-Board Charger 2

B17FF00High-voltage charger, charging module – sensor fault
B184C00Release active
B1AD100Control unit – function restriction
B200000Control unit – function restriction
B200100Control unit – wrong software version
B200500Coding
B200AF0Function restriction, due to high current cut-out
B201200Coding
B203400Warning – overtemperature
C116300Development functions active
P060B00Control unit – internal error
P061000Control unit - variant coding invalid

All 110 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.