Home › Fault codes › U120300
U120300 — Rear ambient light, front left door panel (AL11) – no communication
Rear ambient light, front left door panel (AL11) – no communication. 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 U120300
How to read and clear U120300
- 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 U120300 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
| U11D800 | Right front light for door speaker lighting, implausible message |
| U11FB00 | Sunlight photo sensor, No communication |
| U11FC00 | Windshield washer pump – no communication |
| U11FD00 | Windshield washer pump – message implausible |
| U11FE00 | Ctrl. mod. for fragrance sys., No communication |
| U11FF00 | Ctrl. mod. for fragrance sys., implausible message |
| U120400 | Rear ambient light, front left door panel (AL11) – message implausible |
| U120500 | Rear ambient light, front right door panel (AL15) – no communication |
| U120600 | Rear ambient light, front right door panel (AL15) – message implausible |
| U120700 | Rear ambient light, rear left door panel (AL19) – no communication |
| U120800 | Rear ambient light, rear left door panel (AL19) – message implausible |
| U120900 | Rear ambient light, rear right door panel (AL22) – no communication |
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.