P0138

DTC P0138 - O2 SENSOR CIRCUIT HIGH VOLTAGE (BANK 1 SENSOR 2)

OUTLINE OF DIAGNOSIS
Detect the open or short circuit of rear oxygen sensor.
Judge NG when out of the standard value.




COMPONENT DESCRIPTION




ENABLE CONDITION

GENERAL DRIVING CYCLE
Perform the diagnosis only once during the closed loop.

DIAGNOSTIC METHOD




- Abnormality Judgment
Judge NG when the cumulative time of completing all the malfunction criteria becomes more than time needed for diagnosis.




- Normality Judgment
Judge OK and clear the NG when the malfunction criteria are completed.

DTC CLEAR CONDITION
- When the OK driving cycle was completed 40 times in a row
- When "Clear Memory" was performed

MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When "Clear Memory" was performed

FAIL SAFE
None

ECM OPERATION AT DTC SETTING
- Memorize the freeze frame data. (For test mode $02)
- Memorize the diagnostic value and trouble standard value. (For test mode $06)