Can you provide pictures as to where the Coolant Thermostat Sensor is

Deb, this code can also come up if the vehicle has been turned off several times before it reached operating temperatures. Clear the code, ensure that the vehicle is warmed up prior to turning it off, and then check to see if the code comes back. If it does come back, change the thermostat.

THERMOSTAT REMOVAL/INSTALLATION [LF, L3]

Warning

• Remove and install all parts when the engine is cold, otherwise they can cause severe burns or serious injury.

1.Remove the battery cover. (See 01-17A-2 BATTERY REMOVAL/INSTALLATION[LF, L3].)

2.Disconnect the negative battery cable.

3.Remove the under cover and splash shield as a single unit.

4.Drain the engine coolant. (See 01-12A-3 ENGINE COOLANT REPLACEMENT[LF, L3].)

5.Position the coolant reserve tank out of the way.

6.Remove the plug hole plate. (See 01-1 OA-3 PLUG HOLE PLATE REMOVAL/INSTALLATION[LF, L3].)

7.Position the drive belt out of the way. (See 01-1 OA-4 DRIVE BELT REPLACEMENT[LF, L3].)

8.Remove the drive belt tensioner. (See 01-1 OA-12 TIMING CHAIN REMOVAL/INSTALLATION[LF, L3].)

9.Remove in the order indicated in the table.

10.Install in the reverse order of removal.

11.Add engine coolant. (See 01-12A-3 ENGINE COOLANT REPLACEMENT[LF, L3].)

12.Inspect for engine coolant leakage.

If that does not work, you can always replace the ECT as follows ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/UINSTALLATION[LF, L3]

1.Remove the battery cover.

2.Disconnect the negative battery cable.

3.Remove the plug hole cover.

4.Drain the engine coolant. (See 01-12A-3 ENGINE COOLANT REPLACEMENT[LF, L3].)

5.Disconnect the ECT sensor connector.

6.Remove the ECT sensor using the SST.

7.install in the reverse order of removal.

Tightening torque

10-14 N·m {102-142 kgf·cm, 89-123in·lbf}

It does sound more complicated than it is ;-)...Hope this helps, good luck.