Where is the coolant sensor located on 1990 Volvo 240?

The coolant temperature sensor on a 1990 Volvo 240 is typically located near the thermostat housing on the engine block. It is usually positioned on the cylinder head or the engine block itself, close to where the upper radiator hose connects. To access it, you may need to remove some components for better visibility. Always ensure the engine is cool before attempting to locate or replace the sensor.