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C12BB12 — Servo motor - short circuit to B+
Servo motor - short circuit to B+. The Taycan, 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 C12BB12
How to read and clear C12BB12
- 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 C12BB12 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 Lock Electronics
| C12B801 | Position sensor 1, Electrical malfunction |
| C12B901 | Position sensor 2, Electrical malfunction |
| C12BA01 | Position sensors, Electrical malfunction |
| C12BAF0 | Position sensors, Supply voltage electrical malfunction |
| C12BB01 | Actuator motor, Electrical malfunction |
| C12BB11 | Servo motor - short circuit to ground |
| C12BB13 | Actuator motor, Open circuit |
| C12BB19 | Servo motor current - current limit exceeded |
| C12BB1D | Actuator motor, Current implausible |
| C12BBF0 | Actuator motor, Initialization failed |
| C12BBF1 | Actuator motor, Position implausible |
| C12BC07 | Magnet brake, mechanical malfunction |
All 67 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.