O2 Sensor :(, CEL came on last night Options

[n1ckz0r]

On my way home last night from the mushroomhead concert my check engine light came on. I pulled off the road, checked the oil and checked for any apparent damage to the engine and nothing was wrong. I drove home. This morning i got up and did the check engine thing with the paperclip (thanks how-to articles!) and found out I have error code 27, which just so happens to be the same code that was used in the article.. 2nd O2 Sensor is bad. My problem is I dont have a second o2 sensor anymore, becuase i never hooked it up when i got my headers. Is there a way to reprogram the ecu?


thanks guys

[netrata]

I don't think you can reprogram the ecu so that it will "only" identify one o2 sensor. Since you originally had 2 o2 sensor, i'm guessing you had a California-emissions model. You have two options. Since you probably still have the connector for the o2 sensor for your exhaust manifold, you can extend the wiring of the connector. Then drill a hole big enough to fit a o2 sensor bung somewhere on your exhaust piping (or header) before the cat. converter. And reconnect another o2 sensor so the ecu will identify that there are 2 o2 sensors. Other option, you can get another ecu for your car that is not from a California-emissions model. Reason for this is that the ecu was program to identify just one o2 sensor. I have a 7afe m/t ecu I could sell you if you have an st model. If you have a gt, then you can try asking somebody on this forum or even check ebay for a gt ecu.

[Bitter]

as ive said on 3 different occasions in 2 different threads you need to do the spark plug antifouler trick and have that sensor installed in the exhaust. get the bung welded in at any muffler shop and you can find the antifouler trick all over the internet and even here if you just look.

[n1ckz0r]

either im really bad at searching, or its not there but i tried on these forums and i couldnt find anything

[Bitter]

http://www.6gc.net/forums/index.php?act=Se...e=%2Bantifouler
http://www.scoobymods.com/forums/showthrea...p;highlight=CEL
http://www.google.com/search?client=firefo...G=Google+Search

This post has been edited by Bitter: Oct 31, 2006 - 11:07 PM

[n1ckz0r]

dude, WHAT? I searched for that and nothing came up. maybe my browser?

[bindertch]

All of this is going to come down to emissions. I hope you kept your stock manifold and setup. One other option is to get a catalytic converter that can handle a V-8. Because you are in SoCal you should do that before going to the antifoul trick unless you know someone at a shop. Also install the O2 sensor after the Cat.

[n1ckz0r]

I know this is about emissions... The problem is my stock manifold is cracked. And I had two, my second o2 sensor was after the first cat. So in order to have the o2 sensor work right, i'd have to install it after my cat. I think.

[Bitter]

just toss on a universal cat for an engine thats atleast 2-3 times your engine size and put the 2nd O2 sensor after that cat.

[mycelicagt]

I have a cali spec gt and i swapped out my header and i didnt put that o2 sensor in and the check engine light came on and all i did was put the o2 sensor in the provided spot (ebay header for the 5sfe originally a MR2 header) and now the light doesnt come on what so ever.

[Jaws4God]

Yeah I was wondering about that second o2 sensor. The threads on mine were torn apart so I couldn't put it in the new header.. so we just plugged it up.. Is there a way to wire it up to not use the sensor?

[mycelicagt]

the only way i can possibly think of re wiring the o2 sensors is to cut the 2nd o2 sensor wires and tap into the wires or wire of the 1st one, sorry i didnt pay attention to how many wires there are, but i wouldnt suggest doing this because im not totally sure how this would work out.

[Jaws4God]

the Upstream o2 sensor is 1 wire, the Downstream 2nd o2 sensor is 2 wire ( White & Blue).