2 Oxygen Sensors

[vince]

Does anybody know which oxygen sensor is the "main" one. I have an 89 LX-i and it has two sensors. I'm throwing a code 1 which means the main sensor. I can't find anywhere in the shop manuals where it talks about two sensors. I believe there is a green connector for one, and a white connector for the other. Which is which? Thanks.

[MessyHonda]

my advice is to just change them both beacuse if one throw a singal the other one will soon follow. also check if the engine is running good...give it a nice tune up.

[Strugglebucket]

i think the one with the white plug is sensor "A".

[Cheeseburger]

i would change both of them since ur at it already

[dillirk]

i'm not sure which is which. the plugs from the sensors are green for one and white for the other and have matching colored sockets that they plug into. the green plug o2 sensor should be installed in the bung on the merge of the #2 and#3 cylinders (the one closer to the distributor side of the engine) and the white plug o2 sensor should be installed on the bung on the #1 and #4 merge (closer to timing belt side). does that help?

Once I hade them pluged in rite the lite went away.