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U045200 — Airbag control unit - signal implausible

Airbag control unit - signal implausible. 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 U045200

Porsche Taycan

Air ConditioningBrake ElectronicsDrive Motor Control ModuleEngine Control Module 1Front Corner Radar 1Front Corner Radar 2Front Assist CameraGatewayLock ElectronicsRoll Control SystemTelematics Communication Unit

Porsche 911 (992)

Battery Energy Control ModuleBrake ElectronicsDC/DC Converter Control Module HVDrive Motor Control ModuleEngine Control Module 1ZFAS (Zentrales Fahrer Assistenz System)GatewayTelematics Communication UnitPDK Transmission

Porsche Panamera (971, 2017–2023)

Air Conditioning48 V Battery Management SystemBattery Energy Control ModuleBrake ElectronicsDrive Motor Control ModuleEngine Control Module 1GatewayGQS (Quersperre)Telematics Communication UnitPDK Transmission

Porsche Panamera (972, 2024–)

Air ConditioningBattery Energy Control ModuleBrake ElectronicsDC/DC Converter Control Module HVDrive Motor Control ModuleEngine Control Module 1MRR_VR (Radar VR)MRR_VL (Radar VL)ZFAS (Zentrales Fahrer Assistenz System)GatewayGQS (Quersperre)eAWS1 (elektrische Aktive Wank Stabilisierung 1)Telematics Communication UnitPDK Transmission

Porsche Cayenne (9YA)

Air Conditioning48 V Battery Management SystemBattery Energy Control ModuleBrake ElectronicsDC/DC Converter Control Module HVDrive Motor Control ModuleEngine Control Module 1MRR_VR (Radar VR)MRR_VL (Radar VL)ZFAS (Zentrales Fahrer Assistenz System)GatewayGQS (Quersperre)Telematics Communication UnitTorque Converter (Transmission)

How to read and clear U045200

  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 U045200 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 Air Conditioning

U040200Transmission control unit, signal implausible
U041300High-voltage battery control unit, signal implausible
U041600Data bus - fault value received
U042200Front-end electronics control unit (BCM1) - signal implausible
U042300Instrument cluster control unit – signal implausible
U042500Auxiliary heater control unit – signal implausible
U045600Thermal management control unit - signal implausible
U101100Supply voltage – too low
U101200Supply voltage – too high
U101300Coding
U103000LIN bus 1 – electrical fault
U104700Rear lid control unit - no communication

All 418 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.