How to Test a Chevrolet Coolant Temperature Sensor | It How to Test a Chevrolet Coolant Temperature Sensor. Locate the coolant temperature sensor on the driver's side of the engine block, just behind the power steering pump. Unplug the electrical connection to the switch with your hands, revealing two posts on the sensor. Set the multimeter to the Ohm symbol for resistance. Chevrolet Spark Engine Coolant Temperature Sensor Engine Coolant Temperature Sensor Replacement Cost The average cost for a Chevrolet Spark engine coolant temperature sensor replacement is between $108 and $137. Labor costs are estimated between $61 and $78 while parts are priced between $47 and $59.
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