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B203500 — Control unit, part number implausible
Control unit, part number 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 B203500
How to read and clear B203500
- 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 B203500 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 Exterior Sound Actuator
| B184C00 | Release active |
| B200000 | Control unit – function restriction |
| B200500 | Coding |
| B2008F0 | Function restriction, temperature – above limit value |
| B201200 | Coding |
| B203400 | Warning – overtemperature |
| C104A4B | Temperature - above limit value |
| C113C01 | Acoustic simulator - electrical fault |
| C113C13 | Acoustic simulator - open circuit |
| C125E07 | Exterior acoustics button – mechanical fault |
| P061000 | Control unit - variant coding invalid |
| P138500 | Ctrl. module faulty |
All 50 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.