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DTC P0116: ECT Sensor 1 Range/Performance Problem (2005-2007 models) Honda Accord VII

Testing & Diagnostics ~408 words

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION .

  1. Turn the ignition switch ON (II).
  2. 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.
  3. Note the value of ECT SENSOR 1 in the DATA LIST with the HDS.
  4. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  5. 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, 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 .
  6. Note the value of ECT SENSOR 1 in the DATA LIST with the HDS.
  7. Turn the ignition switch OFF.
  8. Open the hood, and let the engine cool for 3 hours.
  9. Turn the ignition switch ON (II).
  10. 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, 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.
  11. Turn the ignition switch OFF.
  12. Replace ECT sensor 1 (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(ref-217090-S38016301862006012800000) ).
  13. Turn the ignition switch ON (II).
  14. Reset the ECM/PCM with the HDS.
  15. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-217093-S19810389522006012800000) ).
  16. 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 - Go to step 17.
  17. Monitor the OBD STATUS for DTC P0116 in the DTCs MENU with the HDS.
  1. YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 16, go to the indicated DTC's troubleshooting.
  2. NO - If the screen indicates FAILED, check for poor connections or loose terminals at ECT sensor 1 and the ECM/PCM, then go to step 1. If the screen indicates NOT COMPLETED, keep idling until a result comes on.

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