DTC Troubleshooting: P1116
DTC P1116: ECT Sensor 1 Circuit Range/Performance Problem
NOTE:
Before you troubleshoot, review the general troubleshooting information.
If DTC P0111 is stored at the same time as DTC P1116, troubleshoot DTC P0111 first, then recheck for DTC P1116.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P1116 ECT Sensor 1 Circuit Range/Performance Problem
      

1.
Connector visual check:

Connector visual check
?1.
Check for poor connections or loose terminals at these parts:
ECT sensor 1
ECT sensor 2

Are the connections and terminals OK?

     
YES
     
     
     
The parts are OK. Go to step 2.
     
NO
     
     
     
Repair the connections or terminals.?
2.
PGM-FI system check:

PGM-FI system check
?1.
Turn the vehicle to the ON mode.

?2.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P1116 ECT Sensor 1 Circuit Range/Performance Problem
      
P2183 ECT Sensor 2 Circuit Range/Performance Problem
      

Are DTC P1116 and P2183 indicated at the same time?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
Only DTC P1116 is indicated. Go to step 3
3.
ECT sensor 1 performance check:

ECT sensor 1 performance check
?1.
Start the engine, and let it idle for 10 minutes.

?2.
Check the parameter(s) below with the HDS.
Signal
Malfunction Threshold
Current conditions
Values
Unit
Values
Unit
ECT SENSOR 1
Less than 107
°F
    

Do the current condition(s) match the malfunction threshold?

     
YES
     
     
     
     
NO
     
     
     
Go to step 4.
4.
Problem verification:

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

?2.
Allow ECT sensor 1 to cool to the ambient temperature.

?3.
Note the ambient temperature.

?4.
Turn the vehicle to the ON mode.

?5.
Note the value of the ECT SENSOR 1 in the DATA LIST with the HDS.
Signal
Current conditions
Values
Unit
ECT SENSOR 1
    

?6.
Compare the value of ECT SENSOR 1 with the ambient temperature.

Does the value of ECT SENSOR 1 differ 5.4 °F (3 °C) or more from the ambient temperature?

     
YES
     
     
     
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
5.
ECT sensor 1 performance check:

ECT sensor 1 performance check
?1.
Start the engine, and let it idle for 10 minutes.

?2.
Check the parameter(s) below with the HDS.
Signal
Malfunction Threshold
Current conditions
Values
Unit
Values
Unit
ECT SENSOR 1
Less than 107
°F
    

Do the current condition(s) match the malfunction threshold?

     
YES
     
     
     
     
NO
     
     
     
Go to step 6.
6.
ECT sensor 2 performance check:

ECT sensor 2 performance check
?1.
Let the engine idle for 10 minutes.

?2.
Check the parameter(s) below with the HDS.
Signal
Malfunction Threshold
Current conditions
Values
Unit
Values
Unit
ECT SENSOR 2
Less than 107
°F
    

Do the current condition(s) match the malfunction threshold?

     
YES
     
     
     
     
NO
     
     
     
Go to step 7.
7.
Problem verification:

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

?2.
Allow the sensors to cool to the ambient temperature.

?3.
Note the ambient temperature.

?4.
Turn the vehicle to the ON mode.

?5.
Note the value of the ECT SENSOR 1 and ECT SENSOR 2 in the DATA LIST with the HDS.
Signal
Current conditions
Values
Unit
ECT SENSOR 1
    
ECT SENSOR 2
    

?6.
Compare the value of ECT sensor 1 and the value of ECT SENSOR 2 with the ambient temperature individually.

Does either sensor differ more than 5.4 °F (3 °C) from the ambient temperature?

     
YES
     
     
     
Replace the sensor that differed more than 5.4 °F (3 °C) from the ambient temperature.?
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?