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B12F129 — Passenger airbag ON indicator light - signal implausible
Passenger airbag ON indicator light - 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 B12F129
How to read and clear B12F129
- 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 B12F129 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
| B1225F0 | Seat occupancy detection control unit, sensor - open circuit diagnosis not possible |
| B1225F1 | Seat occupancy detection control unit, sensor - open circuit in shield conductor |
| B12F100 | Passenger airbag ON indicator light – equipment fault |
| B12F104 | Passenger airbag ON indicator light - faulty |
| B12F112 | Passenger airbag ON indicator light – short circuit to B+ |
| B12F114 | Passenger airbag ON indicator light – short circuit to ground or open circuit |
| B130400 | Reversible belt tensioner, front left - equipment fault |
| B130402 | Reversible belt tensioner, front left - incorrect message |
| B130404 | Reversible belt tensioner, front left - faulty |
| B130408 | Reversible belt tensioner, front left - incorrect message |
| B130416 | Reversible belt tensioner, front left, voltage - below limit value |
| B130417 | Reversible belt tensioner, front left, voltage - above limit value |
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.