1997 Honda Accord ES tempiture gauge not reading correct temp, what i need to check?

Already replaced thermostat.
Used correct 50/50 mix coolant.
As engine warms up the fans kick on and off properly. Just gauge is reading below operating temp. I drove around and gauge still only reads about 1/3 of the gauge, which is below operating temp. I know the engine is up to temp because fans are operating fine. Just need to know which sensor i need and location of it to replace to get correct reading.

You need to replace the temperature switch.TU188 is the part number to look up on Autozone.com The sensor is usually mounted in the intake manifold, engine block,
or sometimes the thermostat housing.It usually has a one wire harness attached but sometimes has two wires.Don't confuse this for the ect sensor because the ect sends info to the computer rather than the temperature gauge.Use electrically conductive sealant on the threads to prevent leaks and to allow the sensor to be grounded properly

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