Component Inspection

Check HO2S
1. Visually/physically inspect the following conditions:
  - Ensure that the sensor is securely installed
  - Check for corrosion on terminals
  - Check for damaged wiring
  - Repair as necessary and go to next step
2. Warm up the engine to normal operating temperature and let it idle.
3. Connect GDS and monitor the O2 SNSR VOL.-B1/S2 parameter on the GDS data list.
  Specification: Above 0.7V at idle
4. Is sensor data near the specified value?
  YES
  - Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace HO2S and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.