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B126AF0 — Main light switches – button status implausible
Main light switches – button status 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 B126AF0
How to read and clear B126AF0
- 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 B126AF0 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
| B126211 | Night vision/ACC washer pump – short circuit to ground |
| B126215 | Washer pump for night vision system/ACC – short circuit to B+ or open circuit |
| B126611 | Rear window defogger button, Short circuit to ground |
| B126629 | Rear window defogger button, Implausible signal |
| B126A04 | Main light switches – defective |
| B126A29 | Main light switches – signal implausible |
| B126AF1 | Main light switches – button status implausible |
| B126AF2 | Main light switches – part number implausible |
| B128104 | Weather sensor (rain/light/moisture) – defective |
| B12A104 | Left indirect ventilation flap motor, Faulty |
| B12A107 | Left indirect ventilation flap motor, mechanical malfunction |
| B12A11C | Left indirect ventilation flap motor, Voltage implausible |
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.