P0137

DTC P0137 O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 2)

1. OUTLINE OF DIAGNOSIS
Detect the malfunction of oxygen sensor power distribution NG. Judge NG when the oxygen sensor voltage is abnormal with considering the operating conditions.




2. COMPONENT DESCRIPTION







3. ENABLE CONDITION (USED ONLY FOR MALFUNCTION JUDGMENT)

4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after starting the engine at engine steady operation condition.

5. DIAGNOSTIC METHOD




^ Abnormality Judgment
Judge NG when the continuous time of completing the malfunction criteria below becomes more than the time needed for diagnosis. Judge OK when the malfunction criteria below are not completed.

6. DTC CLEAR CONDITION
^ When the OK idling cycle was completed 40 times in a row
^ When "Clear Memory" was performed

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

8. FAIL SAFE
Sub feedback control: Not allowed

9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)