Honda 37870-RTA-005 Sensor Assembly, Water Temperature (Denso)

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Drain the engine coolant, remove the air filter housing, and disconnect the electrical connector from the ECT sensor. Unscrew and remove the ECT sensor and remove and discard the old O-ring. Tighten the ECT sensor to the correct torque, refill the cooling system, raise the vehicle, and support it securely on jackstands. Remove the lower splash shield, unplug the electrical connector, and untighten the sensor from the radiator. To reinstall, switch the removal steps going from the final step to the beginning step. Install a new O-ring on the sensor, tighten the ECT sensor securely, and refill the cooling system.

All models use a variety of electronic sensors and an onboard computer to monitor various engine parameters, engine temperature being one of them. The Powertrain Control Module controls the temperature gauge on the instrument cluster. An individual sending unit for the temperature gauge is not necessary with this technology.

Raise the vehicle and support securely on jackstands.

Models use a variety of electronic sensors and an onboard computer to monitor various engine parameters.

The Engine Coolant Temperature (ECT) sensors are information sensors for the Powertrain Control Module (PCM) and also function as the coolant temperature sending unit for the temperature gauge.

It is important to drain the engine coolant to prevent coolant from leaking from the crossover when the ECT sensor is removed.

Installation involves reversing the removal steps, ensuring a new O-ring is used, and the sensor is tightened to the specified torque. Afterward, refill the cooling system.

The ECT sensor 1 is located at the right end of the cylinder head and can also be found on the thermostat housing.

Yes, a new O-ring should be installed whether you're using the old or a new sensor.