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B166602 — Motor for adjustment of visual display unit, Signal error

Motor for adjustment of visual display unit, Signal error. 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 B166602

Porsche Taycan

Seat Module, DriverSeat Module, Passenger

Porsche 911 (992)

Seat Module, DriverSeat Module, Passenger

Porsche Panamera (971, 2017–2023)

Seat Module, DriverSeat Module, Passenger

Porsche Panamera (972, 2024–)

Seat Module, DriverSeat Module, Passenger

Porsche Cayenne (9YA)

Seat Module, DriverSeat Module, Passenger

How to read and clear B166602

  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 B166602 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 Seat Module, Driver

B164504Airbag in lumbar support 2, Faulty
B164604Airbag in lumbar support 3, Faulty
B164704Airbag for seatback bolster, left, Faulty
B164804Airbag for seatback bolster, right, Faulty
B164904Airbag for side bolster, left, Faulty
B165004Airbag for side bolster, right, Faulty
B166613Motor for adjustment of visual display unit, Open circuit
B16664BDisplay unit adjustment motor, temperature - above limit value
B166654Motor for adjustment of visual display unit, No basic setting
B166B02Motor for adjustment 2 of visual display unit, Signal error
B166B13Motor for adjustment 2 of visual display unit, Open circuit
B166B4BDisplay unit adjustment motor 2, temperature - above limit value

All 222 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.