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C105400 — Left front tire, Tire pressure warning - too low
Left front tire, Tire pressure warning - too low. 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 C105400
How to read and clear C105400
- 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 C105400 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 Brake Electronics
| C100F00 | Left parking brake motor, movem. diffic. |
| C101000 | Right parking brake motor, movem. diffic. |
| C101600 | Development error |
| C101E07 | Button for Hold assist, mechanical malfunction |
| C102E00 | Switch-off due to excessive temperature |
| C104AF0 | Control module, Incorrect Vehicle Identification Number (VIN) |
| C105500 | Left front tire, Tire pressure warning - flat tire |
| C105600 | Right front tire, Tire pressure warning - too low |
| C105700 | Right front tire, Tire pressure warning - flat tire |
| C105800 | Left rear tire, Tire pressure warning - too low |
| C105900 | Left rear tire, Tire pressure warning - flat tire |
| C105A00 | Right rear tire, Tire pressure warning - too low |
All 317 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.