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P1D6400 — Coolant outlet temperature, electrical fault
Coolant outlet temperature, electrical fault. The Taycan 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 P1D6400
How to read and clear P1D6400
- 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 P1D6400 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 Battery Energy Control Module
| P1D5E00 | Current/voltage sensor defective |
| P1D5F00 | Cell module, state of charge – above limit value |
| P1D6000 | Temperature sensor 1 for hybrid/high-voltage battery – above limit value |
| P1D6100 | Temperature sensor 1 for hybrid/high-voltage battery – below limit value |
| P1D6200 | Cell module – temperature measurement defective |
| P1D6300 | Temperature sensor for low-temperature circuit (TME: TW7 / BMS: HV battery input) – above limit value |
| P1D6500 | Cell module, state of charge – below limit value |
| P1D6900 | High-voltage battery, total voltage of cells – implausible |
| P262B00 | Control Module Power Off Timer Performance |
| P29FF00 | Thermal outlier detected |
| P2B2800 | Additional coolant pump in low-temperature circuit (P2) – open circuit |
| P31C500 | Reduced performance due to excessive coolant temperature |
All 198 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.