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P31D900 — High-voltage charger, high-voltage output – short circuit
High-voltage charger, high-voltage output – short circuit. The Taycan, 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 P31D900
How to read and clear P31D900
- 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 P31D900 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 On-Board Charger 2
| P31D100 | Charging socket - temperature sensor, electrical fault |
| P31D200 | Charging socket - overtemperature |
| P31D500 | Charging socket AC, plug lock detection - electrical fault |
| P31D600 | Combination charging socket plug lock detection - electrical fault |
| P31D700 | Charging socket AC, communication connection - short circuit to B+ |
| P31D800 | Combination charging socket, communication connection - short circuit to B+ |
| P31DA00 | Button 1 LED, Electrical error |
| P31DB00 | Button 2 LED, Electrical error |
| P31DC00 | Search illumin. for button module, Electrical error |
| P31DD00 | Charging socket AC, plug lock activation - electrical fault |
| P31DE00 | Combination charging socket, plug lock activation - electrical fault |
| P31DF00 | Charging socket AC, communication connection - short circuit to ground |
All 110 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.