Malfunction Threshold

Either of the condition occurs:

• The voltage level of the SO2HTB2 terminal is OFF (high voltage) for at least 5 seconds despite the PCM outputs ON signal to front secondary HO2S (Bank 2, Sensor 2).
• The front secondary HO2S (Bank 2, Sensor 2) output driver in the PCM detects an over current for at least 5 seconds when the PCM outputs ON signal to secondary HO2S (Bank 2, Sensor 2).