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Home >> Mazda >> 2000 >> MPV DX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0128: Thermostat Stuck Open >> Condition
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DTC P0128: Thermostat Stuck Open: Condition

PCM monitors ECT and compares actual reading to expected ECT reading. If difference is more than specified, DTC is set. Causes may include the following: