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Home >> Oldsmobile >> 2000 >> Intrigue GL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1134: Ho2S Transition Time Ratio - Sensor 1 >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK . After performing OBD system check, go to next step.
  2. Using scan tool, check if DTC P0140 is also set. If DTC P0140 is set, go to step  4. If DTC P0140 is not set, go to next step.
  3. Check if any other powertrain component DTCs are set. Diagnose affected DTC. If no other DTCs are set, go to step  5.
  4. Replace affected HO2S sensors. Ensure cause of contamination are repaired. After repairs, go to step  18.
  5. Using scan tool, store DTC information from PCM into scan tool. Clear DTC from PCM. Reset fuel trim values. Start and operate to normal operating temperature. Operate engine under conditions for running this DTC. Observe DTC status and verify that DTC runs. If this DTC ran and failed this ignition, go to step  7. If this DTC did not ran and fail this ignition, go to next step.
  6. DTC may have set by an exhaust system leak between engine and HO2S, poor HO2S connector terminal contact, water intrusion, improperly torqued sensor, inoperative HO2S heater, poor PCM terminal contact, or faulty HO2S high/low circuit. Repair as necessary. After repairs, go to step  18. If no problems were found, fault is not present. See DIAGNOSTIC AIDS .
  7. Check exhaust system for leaks between engine and HO2S. Check HO2S and PCM connectors for proper terminal contact. Repair as necessary. After repairs, go to step  18. If connector terminal contacts are okay, go to next step.
  8. Turn ignition off. Disconnect affected HO2S harness connector. Using a jumper wire, jumper HO2S low circuit harness connector terminal and a known-good ground. Turn ignition on, with engine off. Using scan tool, monitor voltage to affected HO2S. If voltage reading is 351-551 mV, go to next step. If voltage reading is not 351-551 mV, go to step  13.
  9. Jumper HO2S high signal circuit to ground. Using scan tool, monitor voltage to affected HO2S. If HO2S voltage is less than 20 mV, go to next step. If HO2S voltage is not less than 20 mV, go to step  14.
  10. Remove jumper wire from HO2S low circuit. Using a test light, connect test light between ground and HO2S heater ignition feed circuit at harness connector. If test light illuminates, go to next step. If test light does not illuminate, go to step  15.
  11. Connect test light between HO2S heater ignition feed circuit and heater ground circuit terminals at harness connector. If test light illuminates, go to next step. If test light does not illuminate, go to step  16.
  12. Check contamination sources that caused HO2S to fail. Repair as necessary. After repairs, go to step  17.
  13. Check for faulty HO2S high signal circuit. Repair as necessary. After repairs, go to step  18.
  14. Check for open or high resistance in HO2S high signal or low signal circuits. Repair as necessary. After repairs, go to step  18.
  15. Repair HO2S heater ignition feed circuit. After repairs, go to step  18.
  16. Repair HO2S heater ground circuit. After repairs, go to step  18.
  17. Replace HO2S. After replacing sensor, go to next step.
  18. Using scan tool, read and record FAILURE RECORDS DATA, and clear DTCs. Turn ignition off. Wait 15 minutes then operate vehicle within conditions noted in FAILURE RECORDS data. Using scan tool, select SPECIFIC DTC INFO for this DTC. If scan tool displays that this DTC FAILED THIS IGN, return to step  2. If scan tool does not display that this DTC FAILED THIS IGN, go to next step.
  19. Using scan tool, select CAPTURED INFO function. If any undiagnosed DTCs are displayed, diagnose affected DTCs.
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