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Home >> Honda >> 2007 >> Civic GX >> Repair and Diagnosis >> Engine Performance >> System >> PGM-FI System (R18A1 Engine) >> DTC Troubleshooting >> DTC P1116: ECT Sensor 1 Circuit Range/Performance Problem

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 (see GENERAL TROUBLESHOOTING INFORMATION ).
  • 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  22.

  2. Turn the ignition switch to ON (II).
  3. Check for Pending or Confirmed DTCs with the HDS.

    Are DTC P1116 and P2183 indicated at the same time? 

    YES  -Go to step  12.

    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 (see ECT SENSOR 1 REPLACEMENT  ), then go to step  22.

    NO  -Go to step 6.

  6. Turn the ignition switch to LOCK (0).
  7. Allow ECT sensor 1 to cool to the ambient temperature.
  8. Note the ambient temperature.
  9. Turn the ignition switch to ON (II).
  10. Quickly note the value of IAT SENSOR in the DATA LIST with the HDS.
  11. 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 (see ECT SENSOR 1 REPLACEMENT  ), then go to step  22.

    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.

  12. Start the engine, and let it idle for 10 minutes.
  13. 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 (see ECT SENSOR 1 REPLACEMENT  ), then go to step  22.

    NO  -Go to step 15.

  14. Let the engine idle for 10 minutes.
  15. 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 (see ECT SENSOR 1 REPLACEMENT  ), then go to step  22.

    NO  -Go to step 17.

  16. Turn the ignition switch to LOCK (0).
  17. Allow ECT sensor 1 and 2 to cool to the ambient temperature.
  18. Note the ambient temperature.
  19. Turn the ignition switch to ON (II).
  20. Quickly note the value of ECT SENSOR 1, ECT SENSOR 2, and the IAT SENSOR in the DATA LIST with the HDS.
  21. 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.

  22. Turn the ignition switch to ON (II).
  23. Reset the ECM/PCM with the HDS.
  24. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
  25. Check for Pending or Confirmed 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 Pending or Confirmed DTCs are indicated, go to the INDICATED DTC'S TROUBLESHOOTING .

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