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B14731A — Windshield heating – resistance too low

Windshield heating – resistance too low. 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 B14731A

Porsche Taycan

Comfort System Module

Porsche 911 (992)

BCM2 (Body Control Module 2)

Porsche Panamera (971, 2017–2023)

BCM2 (Body Control Module 2)

Porsche Panamera (972, 2024–)

BCM2 (Body Control Module 2)

Porsche Cayenne (9YA)

BCM2 (Body Control Module 2)

How to read and clear B14731A

  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 B14731A 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 Comfort System Module

B147101Top tailgate proximity sensor – electrical fault
B147204Control unit for windshield heating – faulty
B147216Control unit for windscreen heating – voltage too low
B147217Control unit for windscreen heating – voltage too high
B147298Control unit for windshield heating – temperature too high
B147301Windshield heating – electrical fault
B14731BWindshield heating – resistance too high
B147411Antenna for Comfort Access, rear left door – short circuit to ground
B147412Antenna for Comfort Access, rear left door – short circuit to B+
B147413Comfort Access antenna, rear left door – open circuit
B1474F0Comfort Access antenna, rear left door – mutual short circuit
B147511Comfort Access antenna, rear right door – short circuit to ground

All 616 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.