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B174D04 — Servo motor for right door window horizontal vent – defective
Servo motor for right door window horizontal vent – 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 B174D04
How to read and clear B174D04
- 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 B174D04 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
| B174A04 | Servo motor for extended ventilation panel, defective |
| B174A09 | Servo motor for extended ventilation panel - component fault |
| B174B04 | Left air vent cover motor, faulty |
| B174B09 | Left air vent cover motor, Component defect |
| B174C04 | Servo motor for right door window vertical vent – defective |
| B174C09 | Servomotor right door window vertical vent, component failure |
| B174D09 | Servomotor right door window horizontal vent, component failure |
| B174E04 | Servo motor for rear left air flow, faulty |
| B174E09 | Servo motor for rear left air flow - component fault |
| B174F04 | Servo motor for rear right air flow, faulty |
| B174F09 | Servo motor for rear right air flow - component fault |
| B175B54 | Servomotors LIN1, not taught-in |
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.