Diagnostic Method: Notes

When the oxygen sensor output voltage changes from 0.55 V (rich) to 0.25 V (lean), calculate the Min. value of response time regarded as judgment value while the output varies from 0.5 V to 0.3 V.

Fig 1: Driving Cycle Timing Chart

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When the oxygen sensor output voltage changes from 0.25 V (lean) to 0.55 V (rich), calculate the Min. value of response time regarded as judgment value while the output varies from 0.3 V to 0.5 V.

Fig 1: Identifying Oxygen Sensor Output Voltage Driving Cycle Timing Chart

Courtesy of SUBARU OF AMERICA, INC.