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B18F4F2 — Crash signal from airbag control module, permanently on low level
Crash signal from airbag control module, permanently on low level. 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 B18F4F2
How to read and clear B18F4F2
- 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 B18F4F2 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 Telematics Communication Unit
| B18DDF2 | Emergency call test mode, Airbag function restriction |
| B18DDF3 | Emergency call test mode, Backup battery function restriction |
| B18DDF4 | Emergency call test mode, LED display function restriction |
| B18DDF5 | Emergency call test mode, Emergency call button function restriction |
| B18F4F0 | Crash signal from airbag control module, implausible |
| B18F4F1 | Crash signal from airbag control module, permanently on high level |
| B191604 | Backup battery, Faulty |
| B1916F0 | Backup battery, Critical charge level |
| B1916F1 | Backup battery, Not recognized |
| B1916F4 | Backup battery, Service life critical |
| B1916F5 | Backup battery, Service life exceeded |
| B1A2FF1 | Bluetooth Low Energy antenna, communication error |
All 157 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.