Question about 2002 Mazda Protege

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Check engine light is on. The test said the coolant was too cold. What does that mean? It's a 2002 madza prodege

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This could mean your thermostat has failed and is stuck open not allowing you vehicle to come up to operating temp, or you have a bad Engine Coolant Temp Sensor.

If your heater is taking a long time to start blowing warm air, it is probably a bad thermostat.

Posted on Feb 21, 2009

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