Aerio AWD L4-2.0L (2003)
Engine Temperature Sensor: Component Tests and General Diagnostics
Engine Coolant Temperature (ECT) Sensor Inspection
Warm up sender gauge. Thus make sure its resistance is decreased with increase of its temperature.
ECT sensor specification (Temperature: Resistance)
20 °C (68 °F): 2.32 - 2.59 kOhm
80 °C (176 °F): 310 - 326 Ohm