Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Inspection Procedure
- READ OUTPUT DTC
- Connect an intelligent tester to the DLC3.
- Turn the power switch on (IG) and turn the tester on.
- Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
- Read the DTCs.
Result
DTC CHARTDisplay (DTC Output) Proceed To P0116 A P0116 and other DTCs B
B: GO TO DTC CHART
A: Go to next step
- INSPECT THERMOSTAT
- Remove the thermostat REMOVAL .
- Measure the valve opening temperature of the thermostat.
Standard temperature:
80°C to 84°C (176°F to 183°F)
HINT:
In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.
- Reinstall the thermostat INSTALLATION .
NG: REPLACE THERMOSTAT
OK: REPLACE ENGINE COOLANT TEMPERATURE SENSOR
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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