P0038

DTC P0038 - HO2S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 2)

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




COMPONENT DESCRIPTION




ENABLE CONDITION

GENERAL DRIVING CYCLE
In 10 seconds after starting the engine, perform the diagnosis just once.

DIAGNOSTIC METHOD




Judge NG when the continuous time until completing the malfunction criteria becomes 10 seconds or more. Judge OK when the continuous time until completing none of the malfunction criteria becomes
10 seconds or more.

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)