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B10D904 — Servo motor for front left footwell bypass – faulty
Servo motor for front left footwell bypass – faulty. 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 B10D904
How to read and clear B10D904
- 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 B10D904 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 Air Conditioning
| B10D729 | Servo motor for defroster flap for left side window - message implausible |
| B10D731 | Servo motor for defroster flap for left side window - no communication |
| B10D804 | Right side window defroster door motor, Faulty |
| B10D809 | Right side window defroster door motor, Component defect |
| B10D829 | Servo motor for defroster flap for right side window - message implausible |
| B10D831 | Servo motor for defroster flap for right side window - no communication |
| B10D909 | Servo motor for front left foot bypass – component fault |
| B10D929 | Servo motor for front left footwell bypass - message implausible |
| B10D931 | Servo motor for front left footwell bypass – no communication |
| B10DA04 | Servo motor for front right footwell bypass – defective |
| B10DA09 | Servo motor for front right foot bypass – component fault |
| B10DA29 | Servo motor for front right footwell bypass – message implausible |
All 418 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.