EGCivicCoupe

Now.. My O2 sensor has been setting my Check Engine Light off for the past hmm.. 3 months? Im not sure anymore but anyway.. To the question.

Is it ok for me to be lazy in changing this? Is it horrible to drive alot with a bad O2 sensor? Gas mileage seems to have not been as great

Being lazy and a procrastinator SUCKS

civictildeath

you can do it but your wallet will suffer with these gas prices. check out my o2 simulator thread in my sig below. $30 and like 30 minutes for no CEL

EGCivicCoupe

So do I actually need it? Does it have a purpose? I need to get my car inspected soon too.

I have a spare one on another engine which is sitting around.

civictildeath

ya it fine tunes the air/fuel mixture by telling the ECU how it the mixture is.

the primary o2 sensor is mostly responsible for the mixture though.

EGCivicCoupe

Alright, I am going to show my stupidness when it comes to this but I am pretty sure there are 2 O2 Sensors correct?

I know there is one where the Headers are. That is the main one? How do I know which one needs to be replaced?

civictildeath

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EGCivicCoupe &raquo;</TD></TR><TR><TD CLASS="quote">Headers </TD></TR></TABLE>

you only have one header there EDIT: per engine ooops


have your ECU checked at autozone unless you have a code reader. bank 1 is the primary (one in header) bank 2 is secondary (in cat)


Modified by civictildeath at 11:34 PM 4/5/2005

EGCivicCoupe

Thanks for the info.

I have 2 engines, you didn't know that?

I speak english very good

tominos

the secondary one in the cat is used to check the condition of the cat.