DTC Troubleshooting
DTC Troubleshooting: P1116
DTC P1116: ECT Sensor 1 Circuit Range/Performance Problem
NOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. Initial Inspection and Diagnostic Overview
- If DTC P0111 is stored at the same time as DTC P1116, troubleshoot DTC P0111 first, then recheck for DTC P1116.
1. Check for poor connections or loose terminals at ECT sensor 1 and ECT sensor 2.
Are the connections and the terminals OK?
YES - Go to step 2.
NO - Repair the connections or the terminals, then go to step 25.
2. Turn the ignition switch to ON (II).
3. Check for Temporary DTCs or DTCs with the HDS.
Are DTC P1116 and P2183 indicated at the same time?
YES - Go to step 13.
NO - Go to step 4.
4. Start the engine, and let it idle for 10 minutes.
5. Check ECT SENSOR 1 in the DATA LIST with the HDS.
Is about 95 °F (35 °C) or less indicated?
YES - Replace ECT sensor 1, ECT Sensor 1 Replacement then go to step 25.
NO - Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Drain the coolant. Service and Repair
8. Remove ECT sensor 1, ECT Sensor 1 Replacement and reconnect it to its 2P connector, but do not install it on the engine.
9. Remove the air cleaner cover, but keep the MAF sensor/IAT sensor connector connected.
10. Cool the engine for 1 hour.
11. Turn the ignition switch to ON (II).
12. Compare the value of ECT SENSOR 1 and the IAT SENSOR in the DATA LIST with the HDS.
Does the value of ECT SENSOR 1 differ 5.4 °F (3 °C) or more from the ambient temperature?
YES - Replace ECT sensor 1, ECT Sensor 1 Replacement then go to step 25.
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 ECM/PCM.
13. Start the engine, and let it idle for 10 minutes.
14. Check ECT SENSOR 1 in the DATA LIST with the HDS.
Is about 95 °F (35 °C) or less indicated?
YES - Replace ECT sensor 1, ECT Sensor 1 Replacement then go to step 25.
NO - Go to step 15.
15. Let the engine idle for 10 minutes.
16. Check ECT SENSOR 2 in the DATA LIST with the HDS.
Is about 131 °F (55 °C) or less indicated?
YES - Replace ECT sensor 2, ECT Sensor 2 Replacement then go to step 25.
NO - Go to step 17.
17. Turn the ignition switch to LOCK (0).
18. Drain the coolant. Service and Repair
19. Remove ECT sensor 1 ECT Sensor 1 Replacement and ECT sensor 2. ECT Sensor 2 Replacement Then reconnect the sensors to their connectors, but do not install them.
20. Remove the air cleaner cover, but keep the MAF sensor/IAT sensor connector connected.
21. Cool the engine for 1 hour.
22. Turn the ignition switch to ON (II).
23. Note the value of ECT SENSOR 1, ECT SENSOR 2, and the IAT SENSOR quickly in the DATA LIST with the HDS.
24. Compare the value of ECT SENSOR 1 and the IAT SENSOR, and the value of ECT SENSOR 2 and the IAT SENSOR individually.
Does either sensor differ more than 5.4 °F (3 °C) from the IAT SENSOR?
YES - Replace the sensor that differed more than 5.4 °F (3 °C) from the IAT SENSOR, then go to step 25.
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 ECM/PCM.
25. Turn the ignition switch to ON (II).
26. Reset the ECM/PCM with the HDS.
27. Do the ECM/PCM idle learn procedure. ECM/PCM Idle Learn Procedure (A/T)
28. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1116 indicated?
YES - Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, 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.