K 3500 Truck 4WD V8-6.0L VIN U (2002)
Oxygen Sensor: Description and Operation
Oxygen Sensor Diagnosis
Diagnose the fuel control heated oxygen sensors (HO2S) for the following conditions:
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Heater performance, heater current monitor
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Response switches, number or switches R/L or L/R
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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 HO2S for the following functions:
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Heater performance, heater current monitor
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Signal fixed low
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Signal fixed high
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Inactive sensor
