O2 sensors

M

mikehoward2

New member
Replacing O2 sensors, I know there is an upstream and downstream but can't find downstream on Oriley or rock auto. Do I use upstream for both?
 

First buy ONLY. NGK/NTK
Other brands commonly have issues or lead to issues.

What lead you to replacing O2 sensors?
 
Last edited:

mikehoward2 said:
Check engine light, read code. Also loosing some power from time to time hoping just bad sensors
Click to expand...


mikehoward2 said:
And how many O2 sensors in a 1995 4cyl. And is there a different sensor for downstream?
Click to expand...


What was the code? #?


On the 1995 2.5 cyl there is only one.
Did you initially crawl under here and look?
Oxygen Sensor Part No. Location Note Photo
Oxygen Sensor. 23023. Pre-Cat (ONLY) n/a
 
Last edited:
I have a stupid question.. Are all the sensors the same? I know there are 4 different ones for the 2003 tj X. do i specifically have to purchase a one upstream one downstream.... etc

or can buy just on type..
 
Last edited:
Ken72 said:
I have a stupid question.. Are all the sensors the same? I know there are 4 different ones for the 2003 tj X. do i specifically have to purchase a one upstream one downstream.... etc or can buy just on type..
Click to expand...
Absolutely!! They each have a different part number. Besides the wire length I believe upstream are internally different from downstream. Only by IEM or NTK that is OEM based.

PS the only stupid questions are the ones not asked.
 
You must log in or register to reply here.

Similar threads

M
Random Misfire, No Codes
Replies
11
Views
805
Mercury
M
TerryMason
Replaced my TJ's computer / ECM - should I throw away my original?
Replies
3
Views
11K
JPNinPA
JPNinPA
TerryMason
Time for another water pump
Replies
10
Views
781
JPNinPA
JPNinPA
TerryMason
Recommend a winch plate for my TJ
Replies
7
Views
527
JPNinPA
JPNinPA
M
Distributor Replacement
Replies
1
Views
308
TerryMason
TerryMason
Back
Top