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U042900 — Steering wheel electronics control unit - signal implausible

Steering wheel electronics 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 U042900

Porsche Taycan

Engine Control Module 1GatewayLock Electronics

Porsche 911 (992)

Drive Motor Control ModuleEngine Control Module 1Gateway

Porsche Panamera (971, 2017–2023)

Drive Motor Control ModuleEngine Control Module 1BVS (Bildverarbeitungssystem)GatewayGQS (Quersperre)

Porsche Panamera (972, 2024–)

Drive Motor Control ModuleEngine Control Module 1GatewayGQS (Quersperre)

Porsche Cayenne (9YA)

Drive Motor Control ModuleEngine Control Module 1GatewayGQS (Quersperre)Torque Converter (Transmission)

How to read and clear U042900

  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 U042900 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 Engine Control Module 1

U041600Data bus - fault value received
U041800Control unit for brake electronics (PSM) – signal implausible
U041900Power steering control unit – signal implausible
U042100Control unit for chassis control (PASM) – signal implausible
U042200Front-end electronics control unit (BCM1) - signal implausible
U042300Instrument cluster control unit – signal implausible
U043100Data bus - fault value received
U043300Data bus - message implausible
U043D00Accelerator pedal sensor defective
U044700Gateway control unit – signal implausible
U044C00Contactless charging, diagnostic signal – value range exceeded
U045200Airbag control unit - signal implausible

All 274 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.