Component Inspection

Check the following items and repair as necessary:
- Check for fuel contamination.
- Check for use of improper sealant.
- Check for engine oil/coolant consumption.
- Inspect HO2S for silicon contamination from fuel or use of improper sealant. The HO2S may have a white powdery coating and this will result in a high but false voltage signal (rich exhaust indication).
  
  Fig 1: Inspecting HO2S For Silicon Contamination
Was a problem found in any of the above areas?
YES
1. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
1. Test with a new HO2S and check for proper operation. If problem is corrected, replace HO2S.
2. And go to "VERIFICATION OF VEHICLE REPAIR " procedure.