General Information

Diagnose the fuel control HO2S for the following conditions:
^ Heater performance, time to activity on cold start
^ Slow response
^ Response time, time to switch R/L or L/R
^ Inactive signal, output steady at bias voltage- Approximately 450 mV
^ Signal fixed high
^ Signal fixed low

Diagnose the catalyst monitor HO2S for the following functions:
^ Heater performance, time to activity on cold start
^ Signal fixed low during steady state conditions
^ Inactive sensor