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Discussion Starter · #1 · (Edited)
I've found confliction information about the ECT (Engine Coolant Temperature) Sensor in the 2011 Honda OEM Service Manual.

On page 5-18 near the bottom of the page, in Step 3.

Look for Standard: 2.3 - 2.6 K ohms (20 deg C/68 deg F).

Also

Page 20-13, near top center of page, about the ECT Sensor.

Temperature | 50 deg C (122 F) | 80 deg C (176 F)
Resistance..-| 6.8-7.4 K ohms..-| 2.1 - 2.7 K ohms
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So 20 degrees and 80 degrees C have ~ same resistance, but there is a higher resistance at 50 degrees; this first derivative reversal must drive the temp gauge crazy.
 
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