Component Inspection

■ Visual Check - HO2S(S1) 

1. IG "OFF" and disconnect HO2S(S1) connector.
2. Check that HO2S(S1) is contaminated or damaged by foreign materials.

   YES 

   • Repair or replace as necessary and then, go to "Verification Of Vehicle Repair " procedure.

   NO 

   • Carefully re-do this troubleshooting guide steps.
   • If problem still occurs, replace O2 Sensor 1 and then go to "Verification Of Vehicle Repair " procedure.