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P01E400 — Temperature sensor for high-temperature circuit (TW12) – signal implausible
Temperature sensor for high-temperature circuit (TW12) – signal implausible. 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 P01E400
How to read and clear P01E400
- 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 P01E400 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 Thermal Management
| B3A1C00 | Refrigerant circuit – temperature too high |
| B3A3600 | Actuator for aerodynamic function, implausible temperature |
| C200100 | Coding |
| C200200 | Coding |
| P011600 | Coolant temperature sensor at engine outlet – signal implausible |
| P01E300 | Temperature sensor for high-temperature circuit (TW12) – open circuit |
| P01E500 | Temperature sensor for high-temperature circuit (TW12) – short circuit to ground |
| P01E600 | Temperature sensor for high-temperature circuit (TW12) – short circuit to B+ |
| P048000 | Right radiator fan (RF1), PWM signal line – electrical fault |
| P048100 | Left radiator fan (RF3) PWM signal line – electrical fault |
| P053000 | Refrigerant circuit sensor on high pressure side (PT1) – fault |
| P053100 | Refrigerant circuit sensor on high pressure side (PT1) – pressure implausible |
All 636 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.