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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P1134: Ho2S Transition Time Ratio - Bank 1, Sensor 1 >> Diagnostic Procedures

Diagnostic Procedures

  1. If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM CHECKS. After performing powertrain diagnostic system check, go to next step.
    NOTE: If other DTCs are present (except HO2S DTCs), diagnose those DTCs first. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
  2. Start engine and allow to idle until operating temperature is reached. Raise engine speed to more than 1200 RPM for 2 minutes. Using scan tool, monitor HO2S voltage. If voltage is 400-500 mV, go to next step. If voltage is not 400-500 mV, go to step  4.
  3. Using scan tool, monitor FAIL THIS IGN under DTC info. Operate vehicle within conditions that DTC failed under FAILURE RECORDS. If scan tool indicates that this DTC failed this ignition cycle, go to next step. If scan tool does not indicate that this DTC failed this ignition cycle, see DIAGNOSTIC AIDS .
  4. Check exhaust system for leaks. Ensure that HO2S is securely installed. Check for corrosion on terminals and terminal tension at sensor and PCM. Check for damaged wiring. Repair as necessary. After repairs, go to step  15. If exhaust leak is not present, go to next step.
  5. Disconnect bank 1 sensor 1 HO2S connector. Connect a fused jumper wire between ground and HO2S connector terminal "B" (Purple/White wire). Using scan tool, monitor HO2S voltage. If HO2S voltage is more than 400 mV, go to next step. If HO2S voltage is less than 400 mV, go to step  10.
  6. Remove fused jumper wire. Using DVOM, measure voltage between ground and HO2S connector terminal "B" (Purple/White wire). If voltage is approximately 4.5 volts, go to next step. If voltage is not approximately 4.5 volts, go to step  9.
  7. Using DVOM, measure voltage between ground and HO2S connector terminal "A" (Tan/White wire). If voltage is approximately 5 volts, go to step  11. If voltage is not approximately 5 volts, go to next step.
  8. Check for open or high resistance in Tan/White wire between HO2S and PCM connector C1 terminal No. 27. See Figure. Repair as necessary. After repairs, go to step  15. If circuit is okay, go to step  13.
  9. Check for open or high resistance in Purple/White wire between HO2S and PCM connector C2 terminal No. 12. See Figure. Repair as necessary. After repairs, go to step  15. If circuit is okay, go to step  13.
  10. Check for short to ground in Tan/White wire between HO2S and PCM connector C1 terminal No. 27. See Figure. Repair as necessary. After repairs, go to step  15. If circuit is okay, go to step  14.
  11. Check for poor connections at HO2S connector. Repair as necessary. After repairs, go to step  15. If connections are okay, go to next step.
  12. Isolate source of contamination of HO2S. Check for fuel contamination or use of RTV sealant. After isolating and repairing source of contamination, replace HO2S. After replacing oxygen sensor, go to step  15.
  13. Check for poor connections at PCM. Repair as necessary. After repairs, go to step  15. If connections are okay, go to next step.
  14. Replace PCM. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After repairs, go to next step.
  15. Using scan tool, clear DTCs. Turn ignition off for at least 30 seconds. Start engine and allow it to reach normal operating temperature. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, go to step  2.
  16. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no undiagnosed DTCs are displayed, system is okay.
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