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A bad coolant temperature sensor can cause it to not start. The sensor provides coolant temp info to the computer. In turn, the computer adjusts the air fuel mixture based on temperature. So, the first thing I would do is using a live data scanner, confirm the sensor is indicating the correct temp. If it is way off, replace the sensor.
Here are the directions for replacing the sensor. The attached pictures correlate with the directions. Also, make sure the connector at the sensor is in good condition, free of corrosion.
2002 Kia Truck Sportage 2WD 2Dr L4-2.0L
Vehicle Sensors and Switches Sensors and Switches - Cooling System Engine - Coolant Temperature Sensor/Switch Service and Repair Procedures
The engine coolant temperature sensor is near the thermostat.
1. Disconnect the engine coolant temperature sensor connector.
2. Remove the engine coolant temperature sensor.
1. Install a new washer and the engine coolant temperature sensor onto the engine.
Tighten to 18 - 22 ft-lb (25 - 29 N.M).
2. Connect the engine coolant temperature sensor connector.
3. Start the engine and check for coolant leakage.
Do this and let me know what you find,
Images (Click to enlarge)
Saturday, September 14th, 2019 AT 8:51 PM