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C051800 — Front left speed sensor, mechanical fault

Front left speed sensor, mechanical fault. 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 C051800

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 C051800

  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 C051800 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

C050E00Rear left speed sensor - short circuit to ground
C050F00Rear left speed sensor - short circuit to B+
C051200Rear right wheel speed sensor - open circuit
C051300Rear right wheel speed sensor, implausible signal
C051400Rear right speed sensor - short circuit to ground
C051500Rear right speed sensor - short circuit to B+
C051900Front right speed sensor, mechanical fault
C051A00Rear left speed sensor, mechanical fault
C051B00Rear right speed sensor, mechanical fault
C051C00Sensors for driving dynamics in airbag control unit, signal implausible
C051D00Multi-axis Acceleration Sensor Module "A" Missing Calibration
C051E00Multi-axis Acceleration Sensor Module "A" Intermittent/Erratic

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.