is there any differncne between the 02 in the header and the the one in the cat?

 

No

 

how do you get the one out of the cat without taking the cat off?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by arielb1 &raquo;</TD></TR><TR><TD CLASS="quote">how do you get the one out of the cat without taking the cat off?</TD></TR></TABLE>?

 

just disconnect its harness and remove it

 

i when to pep boys and they told me they only have the 02 sensor that goes in the header. i wanted to know can i use it for in the header and in the cat.... are they the same sensor???

 

they are different. positive!!! different wires length and the o2 sensor for the cat usually have some kinda the plug that prevents water enter the bottom of the car.

 

The length is shorter, yes...but its not too short.
Just reuse that rubber grommet

I am using a primary as a 2ndary

 

e<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jeffchaisi &raquo;</TD></TR><TR><TD CLASS="quote">they are different. positive!!! different wires length and the o2 sensor for the cat usually have some kinda the plug that prevents water enter the bottom of the car.</TD></TR></TABLE> I dont care abou the length of the wire! or the rubber plug.. are there inchangeable??


do they get the same reading?

 

ie: if o got a 02 sensor from the cat, would it PERFECTLY fine in the header?

 

Why do that...just go to a regular parts store Advance...Auto Zone....They have each of the o2 sensors....I'm sure they may be the same sensor but they are 2 different part #'s....Its your call though....

 

for the 3rd time
theyre the same
Searching would have told you the same thing...

 

They are not the same.... For some reason the secondary O2 reads slower than the Primary... You can use the Primary in either but you cannot use the secondary one as your primary.... It screws the ecu all up.... Try it and you'll see....

 

Bone stock 99 Civic Cx - D16Y7: Been running the 2nd O2 as my primary for around 20k miles now (and it started life in my car with a supposed 20-25k on it already) - my *** doesn't notice the difference nor does my gas tank. My *** and gas tank do notice a difference when an O2 has about 60-70k miles on it though - so I've got a 'reference'.

I've also got an OBD2 scanner and check my fuel trim values pretty regularly and they're consistent with what they were when I bought the car...soooo...

 

???