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B18604B — Fore-and-aft adjustment motor for headrest, temperature - above limit value

Fore-and-aft adjustment motor for headrest, temperature - above limit value. 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 B18604B

Porsche Taycan

Seat Module, DriverSeat Module, Passenger

Porsche 911 (992)

Seat Module, DriverSeat Module, Passenger

Porsche Panamera (971, 2017–2023)

Seat Module, DriverSeat Module, PassengerSeat Control Module, Rear Driver SideSeat Control Module, Rear Passenger Side

Porsche Panamera (972, 2024–)

Seat Module, DriverSeat Module, PassengerSeat Control Module, Rear Driver SideSeat Control Module, Rear Passenger Side

Porsche Cayenne (9YA)

Seat Module, DriverSeat Module, Passenger

How to read and clear B18604B

  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 B18604B 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

B185902Motor for head support height adjustment, Signal error
B185913Motor for head support height adjustment, Open circuit
B18594BHeadrest height adjustment motor, temperature - above limit value
B185954Motor for head support height adjustment, No basic setting
B186002Motor for head support length adjustment, Signal error
B186013Motor for head support length adjustment, Open circuit
B186054Motor for head support length adjustment, No basic setting
B192407Head rest height adjustment button, mechanical malfunction
B192429Head rest height adjustment button, Implausible signal
B192507Head rest fore/aft adjustment button, mechanical malfunction
B192529Head rest fore/aft adjustment button, Implausible signal
B193407Entry assistance button, mechanical malfunction

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.