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U125200 — Rear air-conditioning system regulator – no communication
Rear air-conditioning system regulator – 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 U125200
How to read and clear U125200
- 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 U125200 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
| U124900 | Right rear light 2 for door speaker lighting, implausible message |
| U124D00 | Humidity sensor in fresh air intake duct, No communication |
| U124E00 | Humidity sensor in fresh air intake duct, implausible message |
| U124F00 | Electric auxiliary heater (12V) - message implausible |
| U125000 | Fresh air blower, front, No communication |
| U125100 | Fresh air blower, front, implausible message |
| U125300 | Rear A/C control and display head, implausible message |
| U125400 | Air quality sensor, No communication |
| U125500 | Air quality sensor, implausible message |
| U125600 | Rear fresh air blower control module, No communication |
| U125700 | Rear fresh air blower control module, implausible message |
| U125800 | High pressure sensor, 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.