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Not low input sensor...P0117 KIA - Engine Coolant Temperature Sensor 1 Circuit Low Input
Low engine coolant level
Faulty Engine Coolant Temperature (ECT) sensor
Faulty engine coolant thermostat
Engine Coolant Temperature (ECT) sensor harness is open or shorted
Engine Coolant Temperature (ECT) sensor circuit poor electrical connection
in the 5.2L V8 engine the coolant sensor is located on top of the engine. Locate the coolant thick hose coming from top of the ratiator to the top of the engine. Look at the place such hose connects to the engine you wont miss the sensor it is about one inch from there.
2.4 ENGINE COOLANT SENSOR IS LOCATED ON THERMOSTAT HOUSING THE 3.3 AND 3.8 ENGINE COOLANT TEMPERATURE SENSOR IS LOCATED LOWER INTAKE MANIFOLD.ALSO CHECK COOLANT FAN FUSE AND RELAY.FUSES RELAYS LOCATED LEFT SIDE OF THE ENGINE COMPARTMENT.
Thermostat location in 5 cil. engines, temp sensor is located just right or upper arrow in picture. I've included a picture of temp sensor and installation instruccions.
Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
Drain the engine coolant.
Disconnect the ground cable of battery.
Remove the electrical connector from the sensor.
Remove the coolant temperature sensor.
Fig. Coolant temperature sensor illustrated Coolant temperature sensor illustrated
Apply sealant to sensor threads. Install the sensor and tighten to 15-29 ft. lbs. (20-39 Nm).