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C054700 — Vacuum Sensor Supply Voltage Circuit/Open

Vacuum Sensor Supply Voltage Circuit/Open. 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 C054700

Porsche Taycan

Brake Electronics

Porsche 911 (992)

Brake Electronics

Porsche Panamera (971, 2017–2023)

Brake Electronics

Porsche Panamera (972, 2024–)

Brake Electronics

Porsche Cayenne (9YA)

Brake Electronics

How to read and clear C054700

  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 C054700 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 Brake Electronics

C053C00ABS speed sensor – signal implausible
C053D00Brake pressure sensor 1 - signal implausible
C054100Brake pressure sensor 2 - signal implausible
C054200Brake pressure sensor 2 - short circuit to ground
C054300Brake pressure sensor 2 - short circuit to B+
C054500VIN Not Programmed or Incompatible - BSCM
C054800Vacuum Sensor Supply Voltage Low
C054A00Pressure sensor for brake booster - implausible signal
C054B00Pressure sensor for brake booster - short circuit to ground
C054C00Pressure sensor for brake booster - short circuit to B+
C054E00Pressure sensor 2 for brake booster - implausible signal
C054F00Pressure sensor 2 for brake booster - short circuit to ground

All 317 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.