dices543

I have a 96 Civic with a GSR swap. I'm going to be replacing the o2 sensors. I've been doing some research and i'm a bit confused. Some sites say that you can use two of same o2 sensors for pre-cat and post-cat. Other sites say that they are different.
Can i buy 2 of the same O2 Sensors or do i have to buy two different O2 Sensors(pre-cat and post-cat)?

rick_rabies

there is a reason why both pre and post cat sensors are dif looking/price/part #s.

i jus put in a secondary for a guy on accident for a primary....still got the primary o2 CEL/ crome has 2nd o2 disabled.

unless sum1 can PROVE otherwise dont listen to their nonsense

jayWknight

iTrader: (3)

They are both the same type of oxygen in sense of how they function, narrowband. They only differ because of wire length and connector type.

Rick, I don't understand what you are saying that crome has 2nd o2 disable? Crome is obd1, therefore there isn't a second o2 sensor. Crome can only disable the primary o2 sensor and is the only o2 sensor in obd1 ecus.

rick_rabies

96 civic with swap..obd1 conversion. it basiclay jus disables the CEL for it.
the 2nd o2 sensor is only a heater sensor. if the cat gets over heated or back up it will throw a CEL.,

jayWknight

iTrader: (3)

Well the OP is obd2 because he asking about pre-cat and post-cat o2 sensors. Well instead of saying disable, obd1 eliminates the secondary o2 sensor.

dices543

So its the same, i can just buy two of the same and extend the second o2 sensor wire. Correct?

Former User

No, this is not correct. It's an O2 sensor with a heater element.