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B129904 — Passenger display - defective
Passenger display - defective. 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 B129904
How to read and clear B129904
- 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 B129904 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 Information Control Unit
| B1298F5 | Lower air conditioning control panel - supply voltage below lower limit value |
| B1298F6 | Lower air conditioning control panel, line for video signal (LVDS) – open circuit |
| B1298F7 | Lower air conditioning control panel - splitter for video signal software error |
| B1298F8 | Lower air conditioning control panel - splitter for video signal software defective |
| B1298F9 | Lower control panel Air conditioning, touch-sensitive input field Software error |
| B1298FA | Lower air conditioning control panel - touch-sensitive input field faulty |
| B129906 | Passenger display - software error |
| B1299F0 | Passenger display - background lighting short circuit |
| B1299F1 | Passenger display - background lighting open circuit |
| B1299F2 | Passenger display, temperature - upper limit exceeded |
| B1299F4 | Passenger display - supply voltage above upper limit value |
| B1299F5 | Passenger display - supply voltage below lower limit value |
All 614 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.