Hyundai 39220-38030 Sensor & G/UNIT-Water TEMPERTURE

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Handle the ECT sensor with care, as damage will affect the operation of the entire fuel injection system. The ECT sensor is located at the driver's end of the engine near the thermostat housing for 2010 and earlier models. Begin by disconnecting the cable from the negative battery terminal and partially draining the cooling system. Next, disconnect the electrical connector from the ECT sensor, unscrew the sensor from the coolant passage, and avoid sealing the threads of the new sensor with Teflon tape, as this will interfere with grounding; instead, apply a small amount of liquid sealer to the threads before installation. Installation is the reverse of removal, ensuring the sensor is tightened securely, followed by refilling the cooling system. For 2011 and later models, the ECT sensor is located on the back side of the cylinder head. Remove the spring clip and pull the sensor from the coolant temperature control housing, then install the new sensor in reverse order, securing it with the spring clip and refilling the cooling system afterward.

To avoid problems with the ECT sensor, one must avoid any physical contact with this part because any damage to it will result in a failure of the entire fuel injection system. The ECT sensor is Mounted at the driver end of the engine either in the thermostat housing or in the coolant passage as shown in fig 11. First, unplug the cable from the negative terminal and bleed the cooling system by draining a little amount of it. Then, remove the electrical connector of ECT sensor by pulling it off and then unscrew the sensor from the cylinder head. Do not screw tight the new ECT sensor's threads with teflon due to it; as this will affect the grounding you should apply little liquid sealer on the threads before screwing tightly. Last, installations; This is the opposite of the removal where it is made sure that the ECT sensor is well tightened and the cooling system is refilled.

On these models, a thermo switch is located below the temperature sender on the intake manifold. It's responsible for activating the purge control valve of the Evaporative Emissions System, the choke breaker, and the Exhaust Gas Recirculation (EGR) valve.

If the gauge shows a high temperature after warming up, investigate the issue further.

The first step is to drain the cooling system (see Chapter 1) and, for 1.4L and 1.6L models, remove the air filter housing (see Chapter 4).