P1137

DTC P1137 - O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 2)

Middle Electric Potential

OUTLINE OF DIAGNOSIS
- Detect the output property malfunction of from oxygen (A/F) sensor.
- Judge NG when output voltage does not move to lean side or rich side.




COMPONENT DESCRIPTION




ENABLE CONDITION

GENERAL DRIVING CYCLE
Perform the diagnosis just once in 225 seconds or more after starting the engine constantly at 76 km/h (47 MPH) of vehicle speed (Same as A/F sensor response diagnosis).

DIAGNOSTIC METHOD




- Abnormality Judgment
Judge NG when one of the malfunction criteria is completed.




- Normality Judgment
Judge OK when all the malfunction criteria are completed.

DTC CLEAR CONDITION
- When the OK idling 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)