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Home >> Subaru >> 2005 >> Baja Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0139 - O Sensor Circuit Slow Response (Bank 1 Sensor 2) - >> Diagnostic Method >> Judgment Value
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Judgment Value

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Shortest time change from rich (450 mV O2 output) to lean (200 mV) if voltage reduces from 500 mV to 150 mV. > 0.53 seconds
Or, longest time when more than 500 mV > 2 seconds

Time Needed for Diagnosis:  4 seconds

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.



Judge OK when the following standards value are completed.

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Shortest time change from rich (450 mV O2 output) to lean (200 mV) if voltage reduces from 500 mV to 150 mV. </= 0.53 seconds


JUDGMENT VALUE

Malfunction Criteria Threshold Value
Shortest time change from lean (200 mV O2 output) to rich (450 mV) if voltage increases from 150 mV to 500 mV. >/= 2 seconds
Or, longest time of 150 mV or less >/= 120 seconds

Time Needed for Diagnosis:  124 seconds

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.



Judge OK when the following standards value are completed.

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Shortest time change from lean (200 mV O2 output) to rich (450 mV) if voltage increases from 150 mV to 500 mV. < 2 seconds