P1152

DTC P1152 O2 SENSOR CIRCUIT RANGE/PERFORMANCE (LOW) (BANK 1 SENSOR 1)

1. OUTLINE OF DIAGNOSIS
Detect that lamda value remains low.
Judge as NG when lambda value is abnormal in accordance with lamda value of front oxygen (A/F) sensor and running conditions such as vehicle speed, amount of intake air engine coolant temperature, sub feedback control, etc.

lamda value = Actual air fuel ratio/Theoretical air fuel ratio
lamda >1: Lean
lamda < 1: Rich




2. COMPONENT DESCRIPTION




3. ENABLE CONDITIONS

4. GENERAL DRIVING CYCLE
Perform diagnosis continuously at a constant speed of 20 km/h (12 MPH) or more, starting from 60 seconds after starting the engine.




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

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)