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B131D29 — Alarm siren – signal implausible
Alarm siren – signal 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 B131D29
How to read and clear B131D29
- 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 B131D29 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 Comfort System Module
| B130317 | Tailgate proximity sensor control unit – voltage too high |
| B13034A | Tailgate proximity sensor control unit – coding |
| B1303F0 | Tailgate proximity sensor control unit – anti-play prevention active |
| B131329 | Brake light signal line (terminal 54) – signal implausible |
| B131D01 | Alarm siren – electrical fault |
| B131D04 | Alarm siren – defective |
| B131DF5 | Alarm siren – voltage too low |
| B131DF6 | Alarm siren – incorrect code |
| B131E11 | Alarm horn – short circuit to ground |
| B131E15 | Alarm horn – short circuit to B+ or open circuit |
| B133004 | Alarm system sensors (in roof console) – defective |
| B133029 | Alarm system sensors (in roof console) – signal implausible |
All 616 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.