Home › Fault codes › B10B400
B10B400 — Seat occupancy detection control unit - function restriction, undervoltage
Seat occupancy detection control unit - function restriction, undervoltage. 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 B10B400
How to read and clear B10B400
- 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 B10B400 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 Airbag
| B107300 | Analog crash signal (PWM) - equipment fault |
| B107312 | Analog crash signal (PWM) – short circuit to B+ |
| B107314 | Analog crash signal (PWM) – short circuit to ground or open circuit |
| B10B164 | Crash sensors for side airbags - signals implausible |
| B10B200 | Seat occupancy detection control unit - function restriction, missing message |
| B10B300 | Seat occupancy detection control unit - function restriction, message implausible |
| B10B500 | Seat occupancy detection control unit - function restriction, overvoltage |
| B10B600 | Roll-over protection faulty |
| B10E900 | Center crash sensor for pedestrian protection - equipment fault |
| B10E901 | Center crash sensor for pedestrian protection - electrical fault |
| B10E904 | Center crash sensor for pedestrian protection faulty |
| B10E911 | Center crash sensor for pedestrian protection - short circuit to ground |
All 723 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.