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B116921 — Left rear temperature door motor, Lower limit not reached
Left rear temperature door motor, Lower limit not reached. 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 B116921
How to read and clear B116921
- 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 B116921 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
| B10FF15 | Parking Aid Indicator Light, Open circuit/short circuit to B+ |
| B110E01 | Temperature sensor in rear left footwell - electrical fault |
| B110F01 | Temperature sensor in rear right footwell - electrical fault |
| B116904 | Servo motor for rear left temperature mixing flap, faulty |
| B116907 | Left rear temperature door motor, mechanical malfunction |
| B11691C | Left rear temperature door motor, Voltage implausible |
| B116922 | Left rear temperature door motor, Upper limit exceeded |
| B11694B | Left rear temperature door motor, Excess temp. |
| B116A04 | Servo motor for rear right temperature mixing flap, faulty |
| B116A07 | Right rear temperature door motor, mechanical malfunction |
| B116A1C | Right rear temperature door motor, Voltage implausible |
| B116A21 | Right rear temperature door motor, Lower limit not reached |
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.