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B200046 — Control unit – function restriction

Control unit – function restriction. 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 B200046

Porsche Taycan

Matrix Headlamp LeftMatrix Headlamp RightRear View CameraCentral ElectricsComfort System ModuleGatewayHead-Up DisplayInformation Control UnitRear Axle SteeringSound SystemSteering AssistTyre Pressure MonitorTrailer Function

Porsche 911 (992)

Beamer Module Matrix Headlamp LeftBeamer Module Matrix Headlamp RightRueckfahrkameraBCM1 (Body Control Module 1)BCM2 (Body Control Module 2)GatewayMIB2 (Zentralrechner)DSP (Audioverstaerker)Steering AssistRDK (Reifendruckkontrolle)

Porsche Panamera (971, 2017–2023)

Auxiliary HeaterEBKV (Bremskraftverstaerker)RueckfahrkameraBCM1 (Body Control Module 1)BCM2 (Body Control Module 2)GatewayHeadup DisplayMIB2 (Zentralrechner)LCM_L (Lichtsteuerung links)LCM_R (Lichtsteuerung rechts)DVD WechslerRear Axle SteeringSCR (Reduktionsmittel-Dosiersystem)DSP (Audioverstaerker)Steering AssistRDK (Reifendruckkontrolle)AAG (Anhaenger)TV Tuner

Porsche Panamera (972, 2024–)

Auxiliary HeaterBeamer Module Matrix Headlamp LeftBeamer Module Matrix Headlamp RightRueckfahrkameraBCM1 (Body Control Module 1)BCM2 (Body Control Module 2)GatewayHUD (Head Up Display)MIB3 (Zentralrechner)Rear Axle SteeringDSP (Audioverstaerker)Steering AssistRDK (Reifendruckkontrolle)AAG (Anhaenger)

Porsche Cayenne (9YA)

AEM – Active Engine MountsAuxiliary HeaterBeamer Module Matrix Headlamp LeftBeamer Module Matrix Headlamp RightEBKV (Bremskraftverstaerker)RueckfahrkameraBCM1 (Body Control Module 1)BCM2 (Body Control Module 2)GatewayHUD (Head Up Display)MIB2 (Zentralrechner)LCM_L (Lichtsteuerung links)LCM_R (Lichtsteuerung rechts)DVD WechslerRear Axle SteeringSCR (Reduktionsmittel-Dosiersystem)DSP (Audioverstaerker)Steering AssistRDK (Reifendruckkontrolle)AAG (Anhaenger)

How to read and clear B200046

  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 B200046 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 →

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Other codes of the Matrix Headlamp Left

B16CE00Control unit, reset
B184C00Release active
B200000Control unit – function restriction
B200009Ctrl. module faulty
B200100Control unit – wrong software version
B200500Coding
B201200Coding
B2F0100Development code 1
B2F0200Development code 2
C10CA00Limp home active

All 26 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.