Technical Random (flickering) Check engine light

[jackwhoo]

Pre cat o2 sensor switching high / low beautifully

Post cat o2 sensor voltage strange but do we know the sensor type ? Switching or wideband?

 

[ZaphodB]

Pre cat o2 sensor switching high / low beautifully

Post cat o2 sensor voltage strange but do we know the sensor type ? Switching or wideband?

Four wire apparently , so narrowband switching

 

[bugsymike]

Four wire apparently , so narrowband switching

I thought the four wire was standard for the the two heating element wires the five volt and signal?
Wide band is more special for tuning purpose?.

 

[ZaphodB]

I thought the four wire was standard for the the two heating element wires the five volt and signal?

Correct

Which is what it is

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