p0128 chevy trailblazer/ford focus

Chevy Trailblazer P0128 is an OBD-II (On-Board Diagnostics II) trouble code that indicates a problem with the engine coolant temperature (ECT) sensor or thermostat. Specifically, it indicates that the engine coolant temperature is below the thermostat regulating temperature for too long. This code is triggered when the Powertrain Control Module (PCM) determines that the coolant …

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