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B104C29 — Radio key – signal implausible
Radio key – 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 B104C29
How to read and clear B104C29
- 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 B104C29 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
| B102C46 | Coding |
| B103E1A | Fuel level sensor 1 – short circuit to ground |
| B103E1B | Fuel level sensor 1 – open circuit |
| B104A00 | Engine/Motor Control Module 1/power electronics 4 not authorized |
| B104B31 | Radio key – no communication |
| B104BF0 | Key, no sig. during driving mode |
| B104D00 | Radio key – not taught |
| B10581A | Fuel level sensor 2 – short circuit to ground |
| B10581B | Fuel level sensor 2 – open circuit |
| B10591A | Fuel level sensor 1, covering – resistance too low |
| B10591B | Fuel level sensor 1, covering – resistance too high |
| B105A1A | Fuel level sensor 2, covering – resistance too low |
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.