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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0153: Ho2S Slow Response - Bank 2, Sensor 1 >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. If other DTCs are set, diagnose affected DTCs first. If no other DTCs are set, warm engine to normal operating temperature. Operate vehicle within conditions for setting this DTC. If scan too indicates that this DTC failed this ignition, go to next step. If scan tool does not indicate that this DTC failed this ignition, see DIAGNOSTIC AIDS .
  3. If DTC P0133 also failed this ignition, go to step  8. If DTC P0133 did not fail this ignition, go to next step.
  4. Check exhaust system for leaks. Repair as necessary. After repairs, go to step  14. If no exhaust leak is found, go to next step.
  5. Check that HO2S is securely installed. Check for corroded terminals and for proper terminal tension at HO2S and PCM. Check damaged wiring. Repair as necessary. After repairs, go to step  14. If no problem is found, go to next step.
  6. Disconnect HO2S harness connector. Connect a fused jumper wire between ground and PCM connector (PCM side) HO2S low circuit. Monitor HO2S voltage on scan tool. If voltage reading is within range of 350-550 mV, go to next step. If voltage reading is not within range of 350-550 mV, go to step  9.
  7. Jumper PCM harness side of HO2S high and low circuits to battery ground. Monitor HO2S voltage on scan tool. If voltage reading is less than 200 mV, go to step  13. If voltage reading is not less than 200 mV, go to step  9.
  8. Check for fuel contamination. Check for improper use of RTV sealant. Check for engine mechanical condition. Repair as necessary. Replace affected HO2S. After repairs, go to step  14.
  9. Remove jumper wire from HO2S low circuit. Check voltage from HO2S low signal circuit to battery ground. If voltage reading is about 5 volts, go to step  12. If voltage reading is not about 5 volts, go to step  11.
  10. Repair short to ground or short to voltage in HO2S high signal circuit. After repairs, go to step  14.
  11. Repair open in HO2S low circuit or faulty PCM connections. After repairs, go to step  14.
  12. Repair open in HO2S high circuit or faulty PCM connections. After repairs, go to step  14.
  13. Replace HO2S. After replacing sensor, go to next step.
  14. Using scan tool, clear DTCs. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, and then enter this DTC. 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.
  15. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. If no undiagnosed DTCs are displayed, system is okay.
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