1.
Thoroughly check HO2S for contamination,deterioration or damage.
a.
Is HO2S contaminated,deteriorated or damaged?
YES
If damaged or deteriorated temporarily install a known good HO2S and check for porper operation.
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
Problem is intermittent or was repaired and ECM memory was not cleared.
Go to "Verification of Vehicle Repair" procedure.
caution
It is not permitted to check the inetrnal resistance of HO2S with analog multi meter.
