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P26F800 — Coolant pump (P8) – blocked

Coolant pump (P8) – blocked. 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 P26F800

Porsche Taycan

Thermal Management

Porsche 911 (992)

TME (Thermomanagement)

Porsche Panamera (971, 2017–2023)

Engine Control Module 1TME (Thermomanagement)

Porsche Panamera (972, 2024–)

Engine Control Module 1TME (Thermomanagement)

Porsche Cayenne (9YA)

Engine Control Module 1TME (Thermomanagement)

How to read and clear P26F800

  1. Plug a standard ENET (Ethernet-to-OBD) cable into your Porsche's OBD port and your Mac or Windows PC.
  2. Open STEUER14, pick your car and run a fault scan: every control unit is read, and P26F800 shows with its status, its full description and the freeze frame when the unit stores one.
  3. 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 →

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Other codes of the Thermal Management

P268300Coolant bypass valve – short circuit to B+
P26AB00Coolant bypass valve – stuck open
P26B100Coolant bypass valve – blocked in closed position
P26F400Coolant pump (P8, P3), open circuit
P26F500Coolant pump (P8, P3), short circuit to ground or open circuit
P26F600Coolant pump (P8, P3), short circuit to B+
P26F900Coolant pump (P8, P3), temperature too high
P26FA00Coolant pump (P8, P3), dry run
P26FD00Electric air-conditioning compressor (V470) - control unit, error
P293600Temperature sensor for medium-temperature circuit (TW9) – open circuit
P293700Temperature sensor for medium-temperature circuit (TW9) – signal implausible
P293800Temperature sensor for medium-temperature circuit (TW9) – short circuit to ground

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.