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B177729 — Button for sliding roof rear, Implausible signal

Button for sliding roof rear, Implausible signal. The Taycan, 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 B177729

Porsche Taycan

Door Module, Rear DriverDoor Module, Rear Passenger

Porsche Panamera (971, 2017–2023)

Door Module, Rear DriverDoor Module, Rear Passenger

Porsche Panamera (972, 2024–)

Tuer_FSh (Tuere hinten Fahrerseite)Tuer_BFSh (Tuere hinten Beifahrerseite)

Porsche Cayenne (9YA)

Door Module, Rear DriverDoor Module, Rear Passenger

How to read and clear B177729

  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 B177729 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, Rear Driver

B16FC01Door heating element 1, Electrical malfunction
B16FD01Door heating element 2, Electrical malfunction
B16FE01Sensor for door heating element 1, Electrical malfunction
B16FF01Sensor for door heating element 2, Electrical malfunction
B177501Door warning light / entry light, Electrical error
B177629Button sunroof shade button, rear, Implausible signal
B177802Exterior door handle touch sensor, Signal error
B178001Function lighting button interior locking, 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

All 68 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.