How to replace the Engine Coolant Temperature Sensor for a 1997 Saab 900SE

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During normal operation, after the car has been running for several minutes
the temperature gauge should be at the midpoint between L and H, almost completely
horizontal. My temperature gauge rose much less than expected, and over time seemed
to barely rise above L. The operation of the heater was normal indicating that the
thermostat was not faulty. Replacing the Engine Coolant Temperature Sensor
solved the problem.

To replace the engine coolant temperature sensor, unlock the connector and unplug it
as shown in the photo below. Then use a wrench to remove the sensor from the engine block.
When the sensor is removed coolant will flow out, so it is a good idea to have the new sensor
close by, so it can quickly be inserted into the hole where the old sensor is removed from.
After the sensor is tightened, attach the cable and lock it into place. The Engine Coolant
Temperature Sensor is available from the Saabsite (Part # 9182205)

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last update Feb 15, 2006