(b) Oxygen Sensor Diagnosis

Diagnose the Fuel Control Oxygen Sensors (O2S) for the following conditions:
- 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 Heated Oxygen Sensors (HO2S) for the following functions:
- Heater Performance (time to activity on cold start)
- Signal fixed low during steady state conditions or power enrichment (hard acceleration when a rich mixture should be indicated)
- Signal fixed high during steady state conditions or decel fuel mode (deceleration when a lean mixture should be indicated)
- Inactive Sensor (output steady at approximately 438 mV)