P0030

DTC P0030 HO2S HEATER CONTROL CIRCUIT (BANK 1 SENSOR 1)

1. OUTLINE OF DIAGNOSIS
Detect functional errors of the front oxygen (A/F) sensor heater.
Judge as NG when it is determined that the front oxygen (A/F) sensor impedance is large when looking at engine status such as deceleration fuel cut.




2. COMPONENT DESCRIPTION




3. ENABLE CONDITIONS

4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously in 30 seconds after starting the engine.




5. DIAGNOSTIC METHOD
Judge as NG when the continuous time of meeting the malfunction criteria given becomes more than the time needed for diagnosis (10 seconds). Judge as OK and clear NG when the continuous time of not completing the malfunction criteria given becomes more than the time needed for diagnosis (10 seconds).

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

7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
- When the OK driving cycle is completed 3 times in a row
- When "Clear Memory" is performed

8. FAIL SAFE
- Front oxygen (A/F) sensor main learning compensation: Not allowed to calculate.
- Rear oxygen sensor sub learning compensation: Not allowed to calculate.
- Purge control: Not allowed to purge

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