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U12B700 — Brake booster control module, Implausible
Brake booster control module, 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 U12B700
How to read and clear U12B700
- 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 U12B700 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
| U122800 | Implausible driver side door control module |
| U122900 | Implausible front camera for driver assistance systems |
| U122A00 | Implausible steering booster control module |
| U122B00 | Implausible chassis control module |
| U124100 | Steering-angle sensor - implausible |
| U124300 | Airbag control module, Implausible |
| U12C400 | Control module for HV battery charger, Implausible |
| U12D100 | Axle differential lock control module, Implausible |
| U12ED00 | Lane change assistance control module, implausible |
| U131900 | Driver assistance systems control module, implausible |
| U140000 | Function restriction – supply voltage too low |
| U140100 | Function restriction – supply voltage too high |
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.