I drive a 2000 Civic Si... I've been having a problem lately of my car managing to fry my o2 sensor. My check engine light always comes on telling me its toast. Seems to have o2 sensor failure every 2 months after putting in a new one... Its happened twice now and I dont want to have to keep paying a lot of money each time those things go out. I'm running a DC Sports 4 into 1 header with a Greddy mx sport exhaust. Any one ever heard of a problem like this?

 

what 02 sensor do you keep putting in, if its bosch then thats your answer.

 

What trouble code?

 

Shop said code was saying the o2 sensor was running slow (failing) it was for the rear 02 sensor

 

Who makes the O2 sensor ? Is it OEM or aftermarket and if so which brand

 

you could always switch to OBD1 to get rid of that sensor and only have to use the one and leave it in the header

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2000Si_b16A2 &raquo;</TD></TR><TR><TD CLASS="quote">Shop said code was saying the o2 sensor was running slow (failing) it was for the rear 02 sensor</TD></TR></TABLE>
Knowing the code may help narrow down the problem. Maybe it doesn't have anything to do with the o2 at all?

 

I'm in the same boat brother. I have an Apex'i 4-2-1 header, stock cat and midpipe and Mugen Twinloop axleback. I already had to replace the primary (header) O2 sensor, and now a I have a CEL for code 67 ("catalyst system") that I assume probably means the secondary (cat) O2 needs replacing now, but damn those things are expensive

 

second o2 sensor keeps frying... I keep using the oem sensors

 

http://o2simulator.com/

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ekb16 &raquo;</TD></TR><TR><TD CLASS="quote">http://o2simulator.com/</TD></TR></TABLE>

buy the simulator...that code is a bunch of bull crap....most likely when you take your code using the thread at the top of this 92-00 page...its going to come up 67...which is bull because i replaced everything with oem and it still comes up...im starting to think its a scheme to make money offa people

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JoshuaVTEC &raquo;</TD></TR><TR><TD CLASS="quote"> now a I have a CEL for code 67 ("catalyst system") that I assume probably means the secondary (cat) O2 needs replacing now,</TD></TR></TABLE>
An o2 sensor isn't very likely to fix that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chiovnidca &raquo;</TD></TR><TR><TD CLASS="quote">
An o2 sensor isn't very likely to fix that.</TD></TR></TABLE>

Not really, sounds like you have cat failure. need to hook it up to a real diagnostic computer, like a snappon or something of that sort to find out what exactly it is.

 

Yeah i was talking to a guy that said it might be that my cat is bad or something... he told me i should buy a high flow cat from cat co. thats 200 bucks tho...

 

get under your car and knock your cat with a stick or something...if its rattling...then its bad. I replaced my cat with a high flow and that code still comes up...so its really your call

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2000Si_b16A2 &raquo;</TD></TR><TR><TD CLASS="quote">Yeah i was talking to a guy that said it might be that my cat is bad or something... he told me i should buy a high flow cat from cat co. thats 200 bucks tho... </TD></TR></TABLE>

buying a new after market cat is not a bad idea. But before doing this you really need to find out for sure that your cat is your problem.