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C1259F0 — Brake booster control unit – undergoing diagnostics
Brake booster control unit – undergoing diagnostics. 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 C1259F0
How to read and clear C1259F0
- 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 C1259F0 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 Brake Electronics
| C1246F6 | Electromechanical parking brake, Speed sensor malfunction |
| C1246F7 | Electromechanical parking brake, Excessive voltage |
| C1246F8 | Electromechanical parking brake, Insufficient voltage |
| C1246F9 | Electromechanical parking brake, Button interruption |
| C1254F0 | Central ctrl. module for comfort systems, Implausible brake light signal |
| C1255F0 | Towing recognition control module, Implausible brake light signal |
| C125A01 | Left parking brake motor, Engine speed implausible |
| C125AF0 | Activation of parking brake motor, left, Timeout |
| C125B01 | Right parking brake motor, Engine speed implausible |
| C129429 | Brake electronics – implausible signal from chassis controller |
| C129487 | Brake electronics – missing message from chassis controller |
| C1295F0 | Tire check indicator / wheel loose detection, Data implausible |
All 317 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.