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Home >> Honda >> 2000 >> CR-V SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Engine Controls - Self-Diagnostics - 4.3L) >> Diagnostic Trouble Code Identification >> DTC P1134: Ho2S Transition Time Ratio Bank 1, Sensor 1 >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic II (OBD-II) System Check. See SELF-DIAGNOSTICS - INTRODUCTION article. Retrieve and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Ensure Tech 2 scan tool is installed. If any other DTCs are set, diagnose affected DTCs. If no other DTCs are set, go to next step.
  3. Turn engine on and allow it to reach normal operating temperature. Set engine speed at 1200-2000 RPM for 2 minutes. Using scan tool, read HO2S BANK 1 SENSOR 1 voltage. If voltage rapidly switches from less than 0.3 volt to greater than 0.6 volt, go to next step. If voltage does not switch as specified, go to step  5.
  4. With engine speed still at 1200-2000 RPM, read LOOP MODE. If scan tool displays CLOSED LOOP, see DIAGNOSTIC AIDS . If scan tool does not display CLOSED LOOP, go to step  8.
  5. If voltage stays within 0.3-0.6 volt longer than it stays out of range, go to step  8. If voltage stays outside 0.3-0.6 volt longer than it stays within range, go to next step.
  6. Check for faulty connection at VCM HO2S (bank 1, sensor 1) terminals. If faulty connection is found, go to step  10. If connection is okay, go to next step.
  7. Check for faulty connection at HO2S (bank 1, sensor 2) harness connector. If faulty connection is found, go to step  10. If connection is okay, go to step  9.
  8. Check for possible cause of HO2S contamination. Check for antifreeze, silicone, lead deposits or rich fuel operation. Repair or replace as necessary. After repair, go to next step. If no problem was found, go to step  11.
  9. Replace HO2S. After replacing sensor, go to step  11.
  10. Repair circuits and/or connections as necessary. After repairs, go to next step.
  11. Using scan tool, select DTC, CLEAR INFO function. Start engine and allow it to reach operating temperature. Using scan tool, select DTC, SPECIFIC function and enter DTC P1134. Operate vehicle within conditions required to set DTC. If scan tool displays RAN AND PASSED, go to next step. If scan tool does not display RAN AND PASSED, return to step  2.
  12. Using scan tool, select Read and Record INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, diagnose affected DTCs. If no DTCs are displayed, system is okay.
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