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B172F12 — Front external activation, Short circuit to B+
Front external activation, Short circuit to B+. The Taycan, 911 (992), 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 B172F12
How to read and clear B172F12
- 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 B172F12 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 Front Assist Camera
| B15EC12 | Voltage supply for front parking aid sensor, Short circuit to B+ |
| B15EC14 | Voltage supply for front parking aid sensor, Open circuit/short circuit to ground |
| B163002 | Function restriction, route data not loaded |
| B16FB29 | Automated driving button, Implausible signal |
| B170AF1 | Data synchronization for image processing not complete |
| B172F11 | Front external activation, Short circuit to Ground (GND) |
| B173A11 | Rear external activation, Short circuit to Ground (GND) |
| B173A12 | Rear external activation, Short circuit to B+ |
| B1792F1 | Trailer positioning assistant, Poor image quality |
| B1792F2 | Trailer positioning assistant, Not available |
| B1792F4 | Trailer positioning assistant, Software error detected |
| B1792F5 | Trailer positioning assistant, Initialization of software failed |
All 336 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.