Visual Inspection of HO2S
Visually/physically inspect following items:
- Inspect the Rear HO2S for Contaminated, deteriorated or aged Rear HO2S
- If contamination is evident on the HO2S, replace contaminated sensor
Is the HO2S(B1/S2) O.K ?
YES
▶ Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.
There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM.
NO
▶ Substitute with a known - good HO2S(B1S2) and check for proper operation. If the problem is corrected, replace HO2S(B1S2) and go to "Verification of Vehicle Repair" procedure.
