K Tahoe 4WD V8-4.8L VIN V (2000)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor Diagnosis
Diagnose the fuel control heated oxygen sensors for the following conditions:
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Heater performance, time to activity on cold start
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Slow response
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Response time, time to switch R/L or L/R
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Inactive signal, output steady at bias voltage - approximately 450 mV
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Signal fixed high
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Signal fixed low
Diagnose the catalyst monitor heated oxygen sensors for the following functions:
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Heater performance, time to activity on cold start
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Signal fixed low during steady state conditions
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Inactive sensor
