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B18B429 — Exterior door handle actuator, Implausible signal

Exterior door handle actuator, Implausible signal. 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 B18B429

Porsche Taycan

Door Module, DriverDoor Module, PassengerDoor Module, Rear DriverDoor Module, Rear Passenger

Porsche 911 (992)

Tuer_FS (Tuere vorne Fahrerseite)Tuer_BFS (Tuere vorne Beifahrerseite)

Porsche Panamera (971, 2017–2023)

Door Module, DriverDoor Module, PassengerDoor Module, Rear DriverDoor Module, Rear Passenger

Porsche Panamera (972, 2024–)

Tuer_FS (Tuere vorne Fahrerseite)Tuer_BFS (Tuere vorne Beifahrerseite)Tuer_FSh (Tuere hinten Fahrerseite)Tuer_BFSh (Tuere hinten Beifahrerseite)

Porsche Cayenne (9YA)

Door Module, DriverDoor Module, PassengerDoor Module, Rear DriverDoor Module, Rear Passenger

How to read and clear B18B429

  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 B18B429 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 →

Download STEUER14 — free fault reading

Other codes of the Door Module, Driver

B178901Function lighting display LED lane change assistance, Electrical error
B179001Function lighting memory seat LED, Electrical error
B179101Function lighting exit alerter LED, Electrical error
B187629Window control unit, Implausible signal
B18B401Exterior door handle actuator, Electrical malfunction
B18B413Exterior door handle actuator, Open circuit
B18B501Exterior door handle, end position, Electrical malfunction
B18B529Exterior door handle, end position, Implausible signal
B1908F0Crash response, active
B1AAE11Lighting in front door, pin D8 - short circuit to ground
B1AAE13Lighting in front door, pin D8 - open circuit
B1AB111Lighting in front door, pin D3 - short circuit to ground

All 107 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.