Final Thoughts On P0116
From personal experience, I can tell you that it's extremely rare for the ECT sensor to be causing a P0116 DTC on your Honda.
The 2 most likely culprits are:
- Bad thermostat that's either stuck open or stuck closed or just missing.
- Low coolant level.
- Fan motors wired direct and over cooling.
- Fan motor that's inoperative.
Now, if your Honda is also registering trouble codes P0117 ECT Sensor Circuit Low Voltage and/or P0118 ECT Sensor Circuit High Voltage along with code P0116, then you should troubleshoot and repair these first before replacing the thermostat or any other cooling system related component.
More Honda 2.2L, 2.3L Test Tutorials
If this tutorial was helpful/informative, you can find a complete list of tutorials here: Honda 2.2L, 2.3L Index Of Articles.
Here's a sample of the tutorials you'll find in the index:
- P0112 ECT Sensor Circuit Low Voltage (Honda 2.2L, 2.3L).
- P1129 MAP Sensor Signal Colder Than Expected (Honda 2.2L, 2.3L).
- P1128 MAP Sensor Signal Lower Than Expected (Honda 2.2L, 2.3L).
- P0108 Manifold Absolute Pressure (MAP) Circuit High Voltage (Honda 2.2L, 2.3L).
- How To Troubleshoot A No Start (Honda 2.2L, 2.3L).
- How To Test The Igniter, Ignition Coil Accord, Civic, CRV, and Odyssey (at: easyautodiagnostics.com).
- How To Bench Test A Starter Motor (Step By Step) (at: easyautodiagnostics.com).
If this info saved the day, buy me a beer!