Component Inspection

Check HO2S
1. Visually/physically inspect the following items:
  - Ensure that the HO2S is securely installed.
  - Silicon contamination. This contamination will be indicated by a white powdery coating on the portion of the sensor exposed to the exhaust stream and this will result in a but false (high) voltage signal.
  - Fuel, engine coolant or oil contamination.
  - Use of improper sealant.
  - If contamination is evident on the HO2S, Fix the source of the sensor contamination before replacing the sensor to prevent future contamination. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
2. Was a problem found in any of the above areas?
  YES
  - Repair the connector. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Substitute with a known-good component and check for proper operation. If the problem is corrected, replace component and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.