Diagnostic Method 2

Detect the malfunction by calculating the average amplitude of λ.

Fig 1: Front Oxygen (A/F) Sensor Signal (Diagnostic Method 2)

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Judge as NG when the following conditions are established.

Judgment Value 

Time Needed for Diagnosis:  90 seconds

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.