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P057100 — Brake light switch - signal implausible
Brake light switch - signal implausible. 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 P057100
How to read and clear P057100
- Plug a standard ENET (Ethernet-to-OBD) cable into your Porsche's OBD port and your Mac or Windows PC.
- Open STEUER14, pick your car and run a fault scan: every control unit is read, and P057100 shows with its status, its full description and the freeze frame when the unit stores one.
- 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 readingOther codes of the Brake Electronics
| C200600 | Speed sensor - supply voltage too low |
| C200800 | Steering-angle sensor, signal qualification |
| P050F00 | Brake Assist Vacuum Too Low |
| P056000 | Terminal 30 power supply – signal implausible |
| P056200 | Supply voltage - voltage too low |
| P056300 | Supply voltage too high |
| P05DC00 | Brake pedal travel sensor 2 - implausible signal |
| P05FF00 | Brake pressure sensor / brake pedal travel sensor - deviation |
| P060100 | Function restriction |
| P060200 | Programming |
| P060400 | Control unit - function restriction |
| P060600 | Control unit defective |
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.