DTC P0116

DTC P0116  : ECT Sensor 1 Circuit Range/Performance Problem

NOTE:  Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), or How to Troubleshoot the Fuel and Emissions Systems(With Auto Idle Stop System) (2016),  or How to Troubleshoot the A/T System (2014 2015),  or How to Troubleshoot the Fuel and Emissions Systems .

DTC (PGM-FI)

1. 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

   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)

   -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. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.

   - 3. 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 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.

   NO 

   The failure is duplicated. Replace ECT sensor 1 - Refer to: ECT Sensor 1 Removal and Installation, or ECT Sensor 2 Removal and Installation .

3. 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.

   NO 

   The failure is duplicated. Replace ECT sensor 1 - Refer to: ECT Sensor 1 Removal and Installation, or ECT Sensor 2 Removal and Installation .