DTC P0116: ECT Sensor 1 Range/Performance Problem
- Turn the ignition switch to ON (II)
- Check ECT SENSOR 1 in the DATA LIST with the HDS
Is about 176 °F (80 °C) or more, or 0 78 V or less indicated?
YES -Go to step 6
NO -Go to step 3
- Note the value of ECT SENSOR 1 in the DATA LIST with the HDS
- Start the engine Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle
- Check ECT SENSOR 1 in the DATA LIST with the HDS
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 ECM/PCM
NO -Go to step 11
- Note the value of ECT SENSOR 1 in the DATA LIST with the HDS
- Turn the ignition switch to LOCK (0)
- Open the hood, and let the engine cool for 3 hours
- Turn the ignition switch to ON (II)
- Check ECT SENSOR 1 in the DATA LIST with the HDS
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 ECM/PCM
NO -Go to step 11
- Turn the ignition switch to LOCK (0)
- Replace ECT sensor 1 (see ECT SENSOR 1 REPLACEMENT )
- Turn the ignition switch to ON (II)
- Reset the ECM/PCM with the HDS
- Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE )
- Check for Temporary DTCs or DTCs with the HDS
Is DTC P0116 indicated?
YES -Check for poor connections or loose terminals at ECT sensor 1 and the ECM/PCM, then go to step 1
NO -Troubleshooting is complete If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting