Component Inspection - Linear

■ Check HO2S 

1. Visually/Physically inspect the following items:
   • Ensure that the HO2S is securely installed. (Pigtail and wiring harness not making contact with the exhaust pipe)
   • Check for corrosion on terminals and terminal tension (at the HO2S and at the PCM)
   • Front HO2S for 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
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.