P0116

DTC Code	DTC Name
P0116	Engine Coolant Temperature Circuit Range / Performance Problem

DESCRIPTION

Refer to DTC P0117 Click here.

DTC No.	DTC Detection Condition	Trouble Area
P0116	The engine coolant temperature has not dropped completely 6 hours after ignition switch turned off. (2 trip detection logic)	Thermostat Engine coolant temperature sensor

DTC No.

DTC Detection Condition

Trouble Area

P0116

The engine coolant temperature has not dropped completely 6 hours after ignition switch turned off.

(2 trip detection logic)

MONITOR DESCRIPTION

If the engine coolant temperature sensor value does not change after the warmed up engine is stopped and then the next cold engine start is performed, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving cycles, the MIL is illuminated and the DTC is stored.

CONFIRMATION DRIVING PATTERN

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Click here.
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on.
Start the engine and warm it up until the engine coolant temperature reaches 80°C (176°F) or higher.
Turn the ignition switch off and leave the vehicle for 6 hours or more.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.
Read pending DTCs.
Tech Tips
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P0116.

Check the DTC judgment result.

GTS Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

Tech Tips

If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Click here.
Tech Tips
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

CAUTION / NOTICE / HINT

Tech Tips

If any of DTCs P0117, P0118 or P0125 are output simultaneously with DTC P0116, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, 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.
When the DTC is output, check the engine coolant temperature using the GTS. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp. If the Coolant Temp value is lower than the actual engine coolant temperature, the engine coolant temperature sensor circuit may be malfunctioning. In this case, check the wire harnesses and connectors (and those connections) between the ECM and the engine coolant temperature sensor first.

PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)

Read DTCs.

Result
Result	Proceed to
DTC P0116 is output	A
DTC P0116 and other DTCs are output	B

Tech Tips

If any DTCs and other than P0116 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART Click here

A

SFI SYSTEM, Diagnostic DTC:P0116