Component Inspection

■ Visual Inspection 

1. Ignition "OFF" and disconnect HO2S (S2) connector.
2. Check that HO2S (S2) is not contaminated or damaged by foreign materials.
3. Does the HO2S (S2) work properly? (Check variation)

   YES 

   • Go to "Verification of Vehicle Repair " procedure.

   NO 

   • Carefully re-do this troubleshooting guide steps.
   • If problem still occurs, replace HO2S (S2) and then go to "System Inspection" procedure.