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B109D4B — Air distribution door motor, Excess temp.
Air distribution door motor, Excess temp.. 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 B109D4B
How to read and clear B109D4B
- 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 B109D4B 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 Central Electrics
| B10934B | Rear air distribution door motor, Excess temp. |
| B109D04 | Air distribution door motor, Faulty |
| B109D07 | Air distribution door motor, mechanical malfunction |
| B109D1C | Air distribution door motor, Voltage implausible |
| B109D21 | Air distribution door motor, Lower limit not reached |
| B109D22 | Air distribution door motor, Upper limit exceeded |
| B109E13 | A/C compressor run-in - open circuit |
| B109EF0 | Electric air-conditioning compressor (V470), not taught |
| B10AA04 | Rear A/C control and display head, Faulty |
| B10AA16 | Rear A/C control and display head, Voltage too low |
| B10AA17 | Rear A/C control and display head, voltage too high |
| B10AAF0 | Rear A/C control and display head, Button jammed |
All 1472 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.