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`U101200` — Supply voltage – too high

Supply voltage – too high. 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 U101200

Porsche Taycan

Exterior Sound Actuator Sound Actuator Adaptive Cruise Control Airbag Air Conditioning Antenna Control Module On-Board Charger 2 On-Board Charger Matrix Headlamp Left Matrix Headlamp Right Brake Electronics Brake Booster Rear View Camera Central Electrics Comfort System Module Mobile Device Charger Chassis Control Sunroof Control Module Digital Matrix Light Unit Lane Change Assist 2 DC/DC Converter 2 DC/DC Converter Deck Lid Control Unit Door Module, Driver Door Module, Passenger Door Module, Rear Driver Door Module, Rear Passenger Driver Monitoring System Front Corner Radar 1 Front Corner Radar 2 Front Assist Camera Gateway Gear Shift Control Module Head-Up Display Information Control Unit Infotainment Interface Lane Change Assist Laser Scanner Light Control Left Light Control Right Night Vision Assist Rear Axle Steering Roll Control System Seat Module, Driver Seat Module, Passenger Sound System Steering Assist Steering Column Electronics Telematics Communication Unit Telematics Diagnostic Unit Tyre Pressure Monitor Trailer Function

Porsche 911 (992)

Soundaktuator ACC (Abstandsregelung)SC (Airbag)DDA (Digitale Dachantenne)Beamer Module Matrix Headlamp Left Beamer Module Matrix Headlamp Right Brake Electronics EBKV (Bremskraftverstaerker)Rueckfahrkamera BCM1 (Body Control Module 1)BCM2 (Body Control Module 2)Ladegeraet 1 fuer mobile Endgeraete Chassis Control SAD (Schiebedach)Control Unit Digital Matrix Light (ZDML)SWA2 (Spurwechselassistent 2)Kombi LG Tuer_FS (Tuere vorne Fahrerseite)Tuer_BFS (Tuere vorne Beifahrerseite)Driver Monitoring System 2 PADM (Dynamische Aggregatelagerung)ZFAS (Zentrales Fahrer Assistenz System)Gateway WH (Waehlhebel)MIB2 (Zentralrechner)Infotainment Interface SWA (Spurwechselassistent)Light Control Left Light Control Right NightVision (Waermebildkamera)Seat Module, Driver Seat Module, Passenger DSP (Audioverstaerker)Steering Assist Steering Column Electronics ELV – Electric Steering Lock Telematics Communication Unit RDK (Reifendruckkontrolle)

Porsche Panamera (971, 2017–2023)

Exterior Sound Actuator Soundaktuator ACC2 (Abstandsregelung 2)ACC (Abstandsregelung)SC (Airbag)Air Conditioning Auxiliary Heater On-Board Charger Brake Electronics EBKV (Bremskraftverstaerker)Rueckfahrkamera BCM1 (Body Control Module 1)BCM2 (Body Control Module 2)Mobile Device Charger Chassis Control SDC2 (Anzeige Bedieneinheit HL)SDC1 (Anzeige Bedieneinheit HR)SAD2 (Schiebedach2)SAD (Schiebedach)SWA2 (Spurwechselassistent 2)Kombi HDSG (Heckdeckel)Door Module, Driver Door Module, Passenger Door Module, Rear Driver Door Module, Rear Passenger BVS (Bildverarbeitungssystem)Gateway WH (Waehlhebel)Headup Display MIB2 (Zentralrechner)Infotainment Interface SWA (Spurwechselassistent)Light Control Left LCM_L (Lichtsteuerung links)Light Control Right LCM_R (Lichtsteuerung rechts)DVD Wechsler Night Vision Assist Rear Axle Steering SCR (Reduktionsmittel-Dosiersystem)eAWS1 (elektrische Aktive Wank Stabilisierung 1)Seat Module, Driver Seat Module, Passenger Seat Control Module, Rear Driver Side Seat Control Module, Rear Passenger Side DSP (Audioverstaerker)Steering Assist Steering Column Electronics ELV – Electric Steering Lock Telematics Communication Unit Telematics Diagnostic Unit RDK (Reifendruckkontrolle)AAG (Anhaenger)TV Tuner

Porsche Panamera (972, 2024–)

Exterior Sound Actuator Soundaktuator ACC (Abstandsregelung)SC (Airbag)Air Conditioning DDA (Digitale Dachantenne)Auxiliary Heater On-Board Charger Beamer Module Matrix Headlamp Left Beamer Module Matrix Headlamp Right Brake Electronics EBKV (Bremskraftverstaerker)Rueckfahrkamera BCM1 (Body Control Module 1)BCM2 (Body Control Module 2)Mobile Device Charger Mobile Device Charger 2 Chassis Control SAD2 (Schiebedach)SAD (Schiebedach)Control Unit Digital Matrix Light (ZDML)MRR_HL (Radar HL)HDSG (Heckdeckel)Tuer_FS (Tuere vorne Fahrerseite)Tuer_BFS (Tuere vorne Beifahrerseite)Tuer_FSh (Tuere hinten Fahrerseite)Tuer_BFSh (Tuere hinten Beifahrerseite)Driver Monitoring System 2 MRR_VR (Radar VR)MRR_VL (Radar VL)ZFAS (Zentrales Fahrer Assistenz System)Gateway WH (Waehlhebel)HUD (Head Up Display)MIB3 (Zentralrechner)Infotainment Interface MRR_HR (Radar HR)Light Control Left Light Control Right NightVision (Waermebildkamera)Rear Axle Steering Seat Module, Driver Seat Module, Passenger Seat Control Module, Rear Driver Side Seat Control Module, Rear Passenger Side DSP (Audioverstaerker)Steering Assist Steering Column Electronics ELV – Electric Steering Lock Telematics Communication Unit Telematics Diagnostic Unit RDK (Reifendruckkontrolle)AAG (Anhaenger)

Porsche Cayenne (9YA)

Exterior Sound Actuator Soundaktuator ACC (Abstandsregelung)SC (Airbag)Air Conditioning DDA (Digitale Dachantenne)AEM – Active Engine Mounts Auxiliary Heater On-Board Charger Beamer Module Matrix Headlamp Left Beamer Module Matrix Headlamp Right Brake Electronics EBKV (Bremskraftverstaerker)Rueckfahrkamera BCM1 (Body Control Module 1)BCM2 (Body Control Module 2)Mobile Device Charger Chassis Control SDC2 (Anzeige Bedieneinheit HL)SDC1 (Anzeige Bedieneinheit HR)SAD (Schiebedach)Control Unit Digital Matrix Light (ZDML)SWA2 (Spurwechselassistent 2)Kombi HDSG (Heckdeckel)Door Module, Driver Door Module, Passenger Door Module, Rear Driver Door Module, Rear Passenger Driver Monitoring System 2 MRR_VR (Radar VR)MRR_VL (Radar VL)ZFAS (Zentrales Fahrer Assistenz System)Gateway WH (Waehlhebel)HUD (Head Up Display)MIB2 (Zentralrechner)Infotainment Interface SWA (Spurwechselassistent)Light Control Left LCM_L (Lichtsteuerung links)Light Control Right LCM_R (Lichtsteuerung rechts)DVD Wechsler Night Vision Assist Rear Axle Steering SCR (Reduktionsmittel-Dosiersystem)eAWS1 (elektrische Aktive Wank Stabilisierung 1)Seat Module, Driver Seat Module, Passenger DSP (Audioverstaerker)Steering Assist Steering Column Electronics ELV – Electric Steering Lock Telematics Communication Unit Telematics Diagnostic Unit RDK (Reifendruckkontrolle)AAG (Anhaenger)

How to read and clear U101200

Plug a standard ENET (Ethernet-to-OBD) cable into your Porsche's OBD port and your Mac or Windows PC.
Open STEUER14, pick your car and run a fault scan: every control unit is read, and U101200 shows with its status, its full description and the freeze frame when the unit stores one.
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 Exterior Sound Actuator

P061000	Control unit - variant coding invalid
P138500	Ctrl. module faulty
P160A00	Function restriction
P1C8D00	Production restrictions active
P1EEC00	Loudspeaker test active
U101100	Supply voltage – too low
U10D900	Control unit not installed correctly
U110300	Production mode active
U112100	Data bus - missing message
U112200	Data bus - implausible message
U112300	Data bus – fault value received
U120000	Data bus, Faulty

All 50 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.