DTC codes / P26xx · Computer and output circuits / P26F9
P26F9 indicates that the control module for coolant pump C has detected an internal overtemperature condition, meaning the electronics driving that pump are running hotter than the design limit. The module monitors its own temperature and sets this code when the threshold is exceeded, often due to a failing pump, a cooling or electrical problem, or a fault inside the module itself.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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