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B15F929 — Button for defrost function, Implausible signal
Button for defrost function, Implausible signal. 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 B15F929
How to read and clear B15F929
- 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 B15F929 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 Central Electrics
| B15DF04 | Right front light 2 for door speaker lighting, Faulty |
| B15E004 | Left rear light for door speaker lighting, Faulty |
| B15E104 | Right rear light for door speaker lighting, Faulty |
| B15E204 | Left rear light 2 for door speaker lighting, Faulty |
| B15E304 | Right rear light 2 for door speaker lighting, Faulty |
| B15F911 | Button for defrost function, Short circuit to ground |
| B15FA11 | Button for auxiliary water heater, Short circuit to ground |
| B15FA29 | Button for auxiliary water heater, Implausible signal |
| B164211 | Left daytime running lamp and parking lamp bulb 2, Short circuit to ground |
| B164215 | Left daytime running lamp and parking lamp bulb 2, Open circuit/short circuit to B+ |
| B164311 | Right daytime running lamp and parking lamp bulb 2, Short circuit to ground |
| B164315 | Right daytime running lamp and parking lamp bulb 2, Open circuit/short circuit to B+ |
All 1472 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.