Visual Check
- Ignition "OFF" & Disconnect HO2S (B1/S2) connector.
- Check that HO2S (B1/S2) is contaminated or damaged by foreign materials.
- Have any problems been found?
YES
- Repair or replace as necessary and then, go to "VERIFICATION OF REPAIR " procedure.
NO
- Go to "CHECK HO2S (B1/S2) PERFORMANCE " procedure.