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P0CE000 — Coolant valve 1 for hybrid/high-voltage battery – stuck open
Coolant valve 1 for hybrid/high-voltage battery – stuck open. 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 P0CE000
How to read and clear P0CE000
- 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 P0CE000 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
| P0C4500 | Temperature sensor for low-temperature circuit (TME: TW7 / BMS: HV battery input), short circuit to B+ |
| P0CD500 | Temperature sensor for low-temperature circuit (TME: TW8 / BMS: HV battery output) – open circuit |
| P0CD600 | Temperature sensor for low-temperature circuit (TME: TW8 / BMS: HV battery output) – signal implausible |
| P0CD700 | Temperature sensor for low-temperature circuit (TME: TW8 / BMS: HV battery output), short circuit to ground |
| P0CD800 | Temperature sensor for low-temperature circuit (TME: TW8 / BMS: HV battery output), short circuit to B+ |
| P0CDF00 | Coolant valve 1 for hybrid/high-voltage battery – electrical fault |
| P0CE100 | Coolant valve 1 for hybrid/high-voltage battery – stuck closed |
| P0CE200 | Coolant valve 1 for hybrid/high-voltage battery – short circuit to ground |
| P0CE300 | Coolant valve 1 for hybrid/high-voltage battery – short circuit to B+ |
| P0CE900 | Coolant pump (P1) – open circuit |
| P0CEB00 | Coolant pump (P1) – short circuit to ground or open circuit |
| P0CEC00 | Coolant pump (P1) – short circuit to B+ |
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.