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C12B204 — Driver activity sensor, faulty
Driver activity sensor, faulty. The Taycan, 911 (992), 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 C12B204
How to read and clear C12B204
- 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 C12B204 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 Driver Monitoring System
| B200FF7 | Internal malfunction |
| B201200 | Coding |
| C110A76 | Camera control module, Incorrect installation location |
| C12AD11 | Driver activity sensor, video wiring, Short circuit to Ground (GND) |
| C12AD12 | Driver activity sensor, video wiring, Short circuit to B+ |
| C12AD13 | Driver activity sensor, video wiring, Open circuit |
| C12B231 | Driver activity sensor, No signal |
| C12B298 | Driver activity sensor, Temperature too high |
| C12B2F0 | Driver activity sensor, Restricted view |
| C12B2F1 | Driver activity sensor, incorrect serial number |
| C12B2F4 | Driver activity sensor, Internal communication error |
| C12B2F6 | Driver activity sensor, dynamic calibration not possible |
All 35 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.