Adam2000ex

I had a stainless steel high flow cat installed on my 00 civic ex. the muffler place that put it on told me that its going to cause my check engine light to come on because the 02 sensor bung was in the back of the new converter and not in the middle like the factory converter. Which indeed my light came on, but is that why?? Other question is, is there any type of 02 sensor bypass plug or anything that i can get to make the check engine light to go off??

Florida

I think you need the handeld computer thingamajig to turn of the check engine light, but there is a product available the fools the ECU into thinking the standard cat is still in place. www.kteller.com used to have it on there site. You might want to contact them about getting it.

CaliDELSOL93si

they might have just strapped the o2 to the back of the cat. i have heard of weird shit like that before.

CaliDELSOL93si

o, and if you are going to keep the cat, you are going to have to bypass the o2 with one of the hand held computers and you will have to get a socketed ecu so you can chip it to bypass.

good luck

SRT_Andy

Why would you go through the trouble of getting a chipped ECU just to turn the rear O2 sensor off? It can easily be fixed by getting an O2 simualtor, like the one from ECG Electronics. I used it on my 99EX and it worked great - never a problem. Some people don't like it because you have to splice it into the wiring for the O2 sensor, but it's truly simple.

EDIT: Also, using a hand-held to bypass the ECU may work until you disconnect the battery and everything resets.

'98 EX RED

Thanks for the help. Ive been looking for an o2 simulator too.

CaliDELSOL93si

true, i have heard alot of good things about the simulator, i have just not personally used it myself. I have a buddy that works for subaru who has a handheld. he bypassed everything and it worked great. that is only my experience. i would say, go with the simulator, it seams cheaper then the handheld. good luck

rampage918

Is it true that obd 1 ecu dont read both o2 sensors. So can't you get a test pipe o high flow cat with no problem.

Provocateur

Yes, OBD1 cars are not equipped with a secondary O2 sensor, so it will not read it. You will have to get a conversion harness and the ECU and those cost a good amount of money. Just get the O2 simulator to get rid of the CEL.

JDMPONY00

i second that i have the o2 simulator by egc electronics and have had no problem ever since installed on my 2000 turbo si