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B107731 — Rear left ParkAssist sensor (SRL1) – no communication

Rear left ParkAssist sensor (SRL1) – no communication. 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 B107731

Porsche Taycan

Central ElectricsFront Assist Camera

Porsche 911 (992)

BCM1 (Body Control Module 1)ZFAS (Zentrales Fahrer Assistenz System)

Porsche Panamera (971, 2017–2023)

BCM1 (Body Control Module 1)

Porsche Panamera (972, 2024–)

BCM1 (Body Control Module 1)ZFAS (Zentrales Fahrer Assistenz System)

Porsche Cayenne (9YA)

BCM1 (Body Control Module 1)ZFAS (Zentrales Fahrer Assistenz System)

How to read and clear B107731

  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 B107731 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 Central Electrics

B107614Rear left ParkAssist sensor (SRL2) – short circuit to ground or open circuit
B107629Rear left ParkAssist sensor (SRL2) – implausible signal
B107631Rear left ParkAssist sensor (SRL2) – no communication
B107712Rear left ParkAssist sensor (SRL1) – short circuit to B+
B107714Rear left ParkAssist sensor (SRL1) – short circuit to ground or open circuit
B107729Rear left ParkAssist sensor (SRL1) – implausible signal
B107812Rear right ParkAssist sensor (SRR1) – short circuit to B+
B107814Rear right ParkAssist sensor (SRR1) – short circuit to ground or open circuit
B107829Rear right ParkAssist sensor (SRR1) – signal implausible
B107831Rear right ParkAssist sensor (SRR1) – no communication
B107912Rear right ParkAssist sensor (SRR2) – short circuit to B+
B107914Rear right ParkAssist sensor (SRR2) – short circuit to ground or open circuit

All 1472 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.