P014C

DTC P014C O2 SENSOR SLOW RESPONSE - RICH TO LEAN (BANK 1 SENSOR 1)

1. OUTLINE OF DIAGNOSIS
Detect the slow response of front oxygen (A/F) sensor.
For diagnosis, detect the trouble by processing the Lambda waveform in normal driving without forcibly changing the target air fuel ratio.

2. COMPONENT DESCRIPTION






3. ENABLE CONDITION






4. GENERAL DRIVING CYCLE
Perform diagnosis only once in a city driving including normal acceleration and deceleration.

5. DIAGNOSTIC METHOD 1
Detect the malfunction by checking "Cumulative value of time when Lambda changes from lean --> rich" in comparison to "Time during which diagnosis is in progress".






Abnormality Judgment
Judge as NG when the following conditions are established.






Time Needed for Diagnosis: 90 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

Normality Judgment
Judge as OK and clear the NG if the following conditions are established.






Time Needed for Diagnosis: 90 seconds

6. DIAGNOSTIC METHOD 2
Detect the malfunction by the cumulative value obtained from the amount of variation in Lambda change.






Abnormality Judgment
Judge as NG when the following conditions are established.














Time Needed for Diagnosis: 90 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

Normality Judgment
Judge as OK and clear the NG if the following conditions are established.






Time Needed for Diagnosis: 90 seconds