Home › Fault codes › B12F2F1
B12F2F1 — Digital Transmission Content Protection (DTCP), Device certificate authentication error
Digital Transmission Content Protection (DTCP), Device certificate authentication error. 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 B12F2F1
How to read and clear B12F2F1
- 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 B12F2F1 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 Sound System
| B106CF2 | Subwoofer - acoustic error |
| B126B01 | Housing fan, Electrical error |
| B129B11 | Microphone 1 - short circuit to ground |
| B129B12 | Microphone 1 - short circuit to B+ |
| B129B13 | Microphone 1, Open circuit |
| B12F2F0 | Digital Transmission Content Protection (DTCP), Signature authentication error |
| B145600 | Surround speaker - rear left, acoustic fault or polarity reversed |
| B145700 | Rear right mid-range speaker (Surround) - acoustic error |
| B161311 | Microphone 1 for noise reduction - short circuit to ground |
| B161312 | Microphone 1 for noise reduction - short circuit to B+ |
| B161313 | Microphone 1 for noise reduction, Open circuit |
| B1613F0 | Microphone 1 for noise reduction, acoustic error |
All 85 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.