DTC codes / P26xx · Computer and output circuits / P26D2
P26D2 means the engine coolant pump control module has reported an internal over-temperature condition to the powertrain control module (PCM). The module is detecting that its own electronics or power stage are running hotter than the designed limit, which usually points to a failing module, a cooling problem around the module, or excessive current draw from the coolant pump.
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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