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Home >> Chevrolet >> 2001 >> Cavalier LS, 2.4 T >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 2.2L & 2.4L >> Diagnostic Tests >> DTC P0130: O2S1 Circuit Closed-Loop Performance >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK (GASOLINE)  under SELF-DIAGNOSTIC SYSTEM. After performing powertrain diagnostic system check, go to next step.
  2. Turn ignition on, with engine off. Using scan tool, check for DTCs. If any other DTCs are set, diagnose affected DTC(s) first. Start and operate engine at 1200 RPM or more for 2 minutes. Using scan tool, observe O2S voltage parameter. Voltage reading should be varying within a range of 400-500 millivolts. If voltage reading is varying outside of specified value, go to next step. If voltage reading is varying within the specified value, go to step  4 .
  3. Operate vehicle within failure records conditions. If scan tool indicates that this DTC failed in this ignition cycle, go to next step. If scan tool does not indicate that this DTC failed in this ignition cycle, see DIAGNOSTIC AIDS  .
  4. Check for exhaust leaks, improperly installed O2S or damaged sensor wiring. Repair as necessary. After repairs, go to step  13 . If no problems were found, go to next step.
  5. Turn ignition off. Disconnect oxygen sensor harness connector. O2S is located in exhaust manifold. Connect jumper wire between O2S connector terminal "A" (Tan wire) and ground. Turn ignition on, with engine off. Using a DVOM, check voltage between chassis ground and O2S connector terminal "B" (Purple wire). If voltage reading is 351-551 millivolts, go to next step. If voltage reading is not 351-551 millivolts, go to step  8
  6. Connect a jumper wire between O2S harness connector terminals. Using scan tool, monitor O2S voltage. If voltage reading is about zero millivolt, go to step  9 . If voltage reading is not about zero millivolt, go to next step.
  7. Check Tan wire between O2S and PCM for open, high resistance, or short to voltage. Repair as necessary. After repairs, go to step  13 . If circuit is okay, go to step  11 .
  8. Check Purple wire between O2S and PCM for open, high resistance or short to voltage. Repair as necessary. After repairs, go to step  13 . If circuit is okay, go to step  11 .
  9. Check for poor connections at O2S connectors. Repair as necessary. After repairs, go to step  13 . If connections are okay, go to next step.
  10. Check for alcohol contaminated fuel, engine oil or coolant consumption or improper use of RTV sealant, affecting HO2S. Repair cause of contamination and replace O2S. See OXYGEN SENSOR in appropriate REMOVAL, OVERHAUL & INSTALLATION article. After repairs, go to step  13 .
  11. Check for poor connections at PCM. Repair as necessary. After repairs, go to step  13 . If connections are okay, go to next step.
  12. Replace PCM. See POWERTRAIN CONTROL MODULE in appropriate REMOVAL, OVERHAUL & INSTALLATION article. After repairs, go to next step.
  13. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine. Operate vehicle within code enable criteria. If scan tool indicates diagnostic ran and passed, go to next step.
  14. Using scan tool, observe stored information. If any DTCs are displayed that have not been diagnosed, see DIAGNOSTIC TROUBLE CODE DEFINITIONS  .
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