COMPONENT OPERATING RANGE

Engine coolant temperature

Varies with actual engine coolant temperature

HINT:

If DTC P0115, P0116, P0117, P0118 and P0125 are output simultaneously, ECT sensor circuit may be open or shorted. Perform the troubleshooting of DTC P0115, P0117 or P0118 first.
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0116)

Connect the intelligent tester to the DLC3.
Turn the ignition switch ON and turn the tester ON.
Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
Read DTCs.

Result

RESULT CHART

Display (DTC Output)	Proceed to
P0116	A
P0116 and other DTCs	B

B : GO TO RELEVANT DTC CHART

A : Go to next step

INSPECT THERMOSTAT
NG : REPLACE THERMOSTAT

OK : REPLACE ENGINE COOLANT TEMPERATURE SENSOR

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.

Safety Warning

Component Operating Range