DTC Troubleshooting: P0116
DTC P0116: ECT Sensor 1 Circuit Range/Performance Problem
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P0116 ECT Sensor 1 Circuit Range/Performance Problem
   

1.
ECT sensor 1 check:

ECT sensor 1 check
?1.
Turn the vehicle to the ON mode.

?2.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
ECT SENSOR 1
More than 176
°F
    
ECT SENSOR 1
More than 80
°C

Do the current condition(s) match the threshold?

     
YES
     
     
     
Note the value of ECT SENSOR 1, then go to step 3.
     
NO
     
     
     
Note the value of ECT SENSOR 1, then go to step 2.
2.
Problem verification (low temperature):

Problem verification (low temperature)
?1.
Note the value of ECT SENSOR 1 in the DATA LIST with the HDS.
Signal
Current conditions
Values
Unit
ECT SENSOR 1
    

?2.
Start the engine.

?3.
Hold the engine speed at 3,000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

?4.
Check ECT SENSOR 1 in the DATA LIST with the HDS.
Signal
Current conditions
Values
Unit
ECT SENSOR 1
    

Does ECT SENSOR 1 change 18 °F (10 °C) or more?

     
YES
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1 and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
     
NO
     
     
     
The failure is duplicated. Replace ECT sensor 1.?
3.
Problem verification (high temperature):

Problem verification (high temperature)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Open the hood, and let the engine cool for 3 hours.

?3.
Turn the vehicle to the ON mode.

?4.
Check ECT SENSOR 1 in the DATA LIST with the HDS.
Signal
Current conditions
Values
Unit
ECT SENSOR 1
    

Does ECT SENSOR 1 change 18 °F (10 °C) or more?

     
YES
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1 and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
     
NO
     
     
     
The failure is duplicated. Replace ECT sensor 1.?