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4.0 sohc o2 sensor bank 1?


mooty

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Ford
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Novice here, my odb2 reader indicates a delayed response in o2 bank 1. The check engine light only comes on for this once in a long while. I was curious if either of these are o2 sensors and perhaps if they are bank 1?


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RonD

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Bank 1 is the passenger side
Bank 2 is the drivers side

Sensor 1 is the sensor closest to the exhaust manifold
Sensor 2 is the sensor near or behind the catalytic converter

So bank 1 sensor 1 would be.............................
Passenger side near exhaust manifold

bank 2 sensor 1...................
Driver side near exhaust manifold

bank 1 sensor 2.......................
near cat converter, if you have dual exhaust and 2 cats, then it would be passenger side O2 near cat

Sensor 1's help computer control fuel trim lean/rich feedback

Sensor 2's test if cat is working and clean up exhaust emissions, they are also used in Long Term Fuel trims
 
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