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U140000 — Function restriction – supply voltage too low
Function restriction – supply voltage too low. 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 U140000
Porsche Taycan
Exterior Sound ActuatorSound ActuatorAdaptive Cruise ControlAerodynamics Control UnitAir ConditioningAntenna Control ModuleOn-Board Charger 2On-Board ChargerBattery Energy Control ModuleMatrix Headlamp LeftMatrix Headlamp RightRear Operating UnitBrake ElectronicsBrake BoosterRear View CameraCentral ElectricsComfort System ModuleMobile Device ChargerChassis ControlSunroof Control ModuleLane Change Assist 2Instrument ClusterDC/DC Converter 2DC/DC ConverterDeck Lid Control UnitDriver Monitoring SystemFront Corner Radar 1Front Corner Radar 2Front Assist CameraGear Shift Control ModuleInformation Control UnitLane Change AssistLaser ScannerLight Control LeftLight Control RightNight Vision AssistOTA Function Control UnitRear Axle SteeringRoll Control SystemSeat Module, DriverSeat Module, PassengerSound SystemSteering AssistSteering Column ElectronicsThermal ManagementTrailer Function
Porsche 911 (992)
SoundaktuatorACC (Abstandsregelung)Aerodynamics Control UnitAll-Wheel Drive ControlDDA (Digitale Dachantenne)Battery Energy Control ModuleBeamer Module Matrix Headlamp LeftBeamer Module Matrix Headlamp RightBedienSG_vo (Bedieneinheit vorne)Brake ElectronicsEBKV (Bremskraftverstaerker)RueckfahrkameraBCM1 (Body Control Module 1)BCM2 (Body Control Module 2)Ladegeraet 1 fuer mobile EndgeraeteChassis ControlSAD (Schiebedach)SWA2 (Spurwechselassistent 2)Kombi LGDriver Monitoring System 2Drive Motor Control ModulePADM (Dynamische Aggregatelagerung)Convertible Top Control UnitLift VA (Lift Vorderachse)ZFAS (Zentrales Fahrer Assistenz System)WH (Waehlhebel)MIB2 (Zentralrechner)SWA (Spurwechselassistent)Light Control LeftLight Control RightNightVision (Waermebildkamera)Rear Axle SteeringSeat Module, DriverSeat Module, PassengerDSP (Audioverstaerker)Steering AssistSteering Column ElectronicsTME (Thermomanagement)VTS (Diebstahlverfolgungssystem)
Porsche Panamera (971, 2017–2023)
Exterior Sound ActuatorSoundaktuatorACC2 (Abstandsregelung 2)ACC (Abstandsregelung)Aerodynamics Control UnitAir ConditioningAuxiliary HeaterOn-Board Charger48 V Battery Management SystemBattery Energy Control ModuleBedienSG_hi (Bedieneinheit hinten)BedienSG_vo (Bedieneinheit vorne)Brake ElectronicsEBKV (Bremskraftverstaerker)RueckfahrkameraBCM1 (Body Control Module 1)BCM2 (Body Control Module 2)Mobile Device ChargerChassis ControlSDC2 (Anzeige Bedieneinheit HL)SDC1 (Anzeige Bedieneinheit HR)SAD2 (Schiebedach2)SAD (Schiebedach)SWA2 (Spurwechselassistent 2)KombiDCDC 48V (Spannungswandler 48V)HDSG (Heckdeckel)Drive Motor Control ModuleBVS (Bildverarbeitungssystem)WH (Waehlhebel)Headup DisplayMIB2 (Zentralrechner)SWA (Spurwechselassistent)Light Control LeftLCM_L (Lichtsteuerung links)Light Control RightLCM_R (Lichtsteuerung rechts)DVD WechslerNight Vision AssistRear Axle SteeringSCR (Reduktionsmittel-Dosiersystem)eAWS1 (elektrische Aktive Wank Stabilisierung 1)Seat Module, DriverSeat Module, PassengerSeat Control Module, Rear Driver SideSeat Control Module, Rear Passenger SideDSP (Audioverstaerker)Steering AssistSteering Column ElectronicsTME (Thermomanagement)AAG (Anhaenger)VTS (Diebstahlverfolgungssystem)
Porsche Panamera (972, 2024–)
Exterior Sound ActuatorSoundaktuatorACC (Abstandsregelung)Aerodynamics Control UnitAir ConditioningDDA (Digitale Dachantenne)Auxiliary HeaterOn-Board ChargerBattery Energy Control ModuleBeamer Module Matrix Headlamp LeftBeamer Module Matrix Headlamp RightBedienSG_hi (Bedieneinheit hinten)BedienSG_vo (Bedieneinheit vorne)Brake ElectronicsEBKV (Bremskraftverstaerker)RueckfahrkameraBCM1 (Body Control Module 1)BCM2 (Body Control Module 2)Mobile Device ChargerMobile Device Charger 2Chassis ControlSAD2 (Schiebedach)SAD (Schiebedach)MRR_HL (Radar HL)Kombi LGHDSG (Heckdeckel)Driver Monitoring System 2Drive Motor Control ModuleMRR_VR (Radar VR)MRR_VL (Radar VL)ZFAS (Zentrales Fahrer Assistenz System)WH (Waehlhebel)HUD (Head Up Display)MIB3 (Zentralrechner)MRR_HR (Radar HR)Light Control LeftLight Control RightNightVision (Waermebildkamera)Rear Axle SteeringeAWS1 (elektrische Aktive Wank Stabilisierung 1)Seat Module, DriverSeat Module, PassengerSeat Control Module, Rear Driver SideSeat Control Module, Rear Passenger SideDSP (Audioverstaerker)Steering AssistSteering Column ElectronicsAAG (Anhaenger)
Porsche Cayenne (9YA)
Exterior Sound ActuatorSoundaktuatorACC (Abstandsregelung)Aerodynamics Control UnitAir ConditioningAll-Wheel Drive ControlDDA (Digitale Dachantenne)AEM – Active Engine MountsAuxiliary HeaterOn-Board Charger48 V Battery Management SystemBattery Energy Control ModuleBeamer Module Matrix Headlamp LeftBeamer Module Matrix Headlamp RightBedienSG_hi (Bedieneinheit hinten)BedienSG_vo (Bedieneinheit vorne)Brake ElectronicsEBKV (Bremskraftverstaerker)RueckfahrkameraBCM1 (Body Control Module 1)BCM2 (Body Control Module 2)Mobile Device ChargerChassis ControlSDC2 (Anzeige Bedieneinheit HL)SDC1 (Anzeige Bedieneinheit HR)SAD (Schiebedach)SWA2 (Spurwechselassistent 2)KombiDCDC 48V (Spannungswandler 48V)HDSG (Heckdeckel)Driver Monitoring System 2Drive Motor Control ModuleMRR_VR (Radar VR)MRR_VL (Radar VL)ZFAS (Zentrales Fahrer Assistenz System)WH (Waehlhebel)HUD (Head Up Display)MIB2 (Zentralrechner)SWA (Spurwechselassistent)Light Control LeftLCM_L (Lichtsteuerung links)Light Control RightLCM_R (Lichtsteuerung rechts)DVD WechslerNight Vision AssistRear Axle SteeringSCR (Reduktionsmittel-Dosiersystem)eAWS1 (elektrische Aktive Wank Stabilisierung 1)Seat Module, DriverSeat Module, PassengerDSP (Audioverstaerker)Steering AssistSteering Column ElectronicsTME (Thermomanagement)AAG (Anhaenger)VTS (Diebstahlverfolgungssystem)
How to read and clear U140000
- 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 U140000 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 →
Download STEUER14 — free fault readingOther codes of the Exterior Sound Actuator
| U110300 | Production mode active |
| U112100 | Data bus - missing message |
| U112200 | Data bus - implausible message |
| U112300 | Data bus – fault value received |
| U120000 | Data bus, Faulty |
| U120100 | Data bus, No communication |
| U140100 | Function restriction – supply voltage too high |
| U18C800 | Data bus, Faulty |
| U1A5F00 | Acoustic Simulator (J943), unexpected restart |
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.