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Home >> BMW >> 1990 >> 325is Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Trouble Code Diagnosis >> Trouble Code 03 - Coolant Temperature Sensor
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Trouble Code 03 - Coolant Temperature Sensor

The coolant temperature sensor is faulty or the engine is running too hot or too cold. This is due to a faulty cooling system component. To correct this test the coolant temperature sensor and cooling system components.

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