Guangzhou Mobai Auto Parts Co.,Ltd

The role of the oxygen sensor


Oxygen sensor : that’s pretty much it. It’s measured the amount of oxygen to determine 


A/F ratio then send voltage as an feedback back to ECU to adjust fuel accordingly. On 96 


and newer car you have one before the cat and one after. The one after actually measure 


the effectiveness of the cat by comparison voltage with the one before.


oxygen sensor


o2 sensor


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