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Engine Coolant Temperature (ECT) Sensors 1 and 2

WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.

ECT sensors 1 and 2 are temperature dependent resistors (thermistors). The resistance decreases as the engine coolant temperature increases.

Fig 1: Identifying Sectional View Of Engine Coolant Temperature (ECT) Sensors
G05952811Courtesy of AMERICAN HONDA MOTOR CO., INC.