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Forum namePerformance/Engine
Topic subjectRear O2 CEL code how to fix?
Topic URLhttps://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=60391
60391, Rear O2 CEL code how to fix?
Posted by BlackGSTurbo, Sep-29-03 03:03 PM
i have a straight pipe where my cat was and i always get a cel code isn't there a mode i can do to fix this? if so could you explain?
60392, RE: Rear O2 CEL code how to fix?
Posted by Franklindsm, Sep-29-03 03:06 PM
I know this is your second post and all, but dude do some searching. go to search and type "resistor mod" and you'll get all you need.

60398, RE: Rear O2 CEL code how to fix?
Posted by JWoodley, Sep-29-03 06:18 PM
ive had this code shining bright and orange for about 8months now. ask around, alot of people consider the CEL to be an honor of sorts. It means you arent stock and proud to be a DSM owner. Get used to them...lol Welcome to 2GNT, btw. :thumbsup
60401, RE: Rear O2 CEL code how to fix?
Posted by XtremeRS, Sep-29-03 07:01 PM
Get a 1 Megaohm, 1/4 watt, 5% tolerance resistor at your local radio shack. Get to the rear o2 sensor, find the wire harness coming from it. Splice into the sheathing, and get the black wire. Cut it in half, and SOLDER the resistor inline. Tape it up real good, and that will take care of the CEL.
60402, RE: Rear O2 CEL code how to fix?
Posted by pn0ymahal, Sep-29-03 07:18 PM
does it matter where you put the resistor? like how close to the rear o2 sensor? i know the rear o2 sensor goes into the car and is under the drivers seat, so can i just got the black wire under the seat and solder it around that area? this will work for which cel code(s) again? i might get a high flow cat soon so just in case.
thanks
Michael
99gs
HRC Stage IV 8-Injector Setup
2GNT Member #32
60403, RE: Rear O2 CEL code how to fix?
Posted by MetalJim, Sep-29-03 07:22 PM
http://homepage.mac.com/brossow/neon/pic/cat_resistor.html


95 Eclipse RS : 5 speed
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60408, RE: Rear O2 CEL code how to fix?
Posted by BlackGSTurbo, Sep-29-03 11:51 PM
i apolegize for not searching i should have cause i've seen you reply to others like me. but it's cool thanks for the link.
60624, RE: Rear O2 CEL code how to fix?
Posted by pn0ymahal, Oct-02-03 05:25 PM
question if you put this resistor inline with the black wire to clear the cel code will it mess with my fuel trims in any way? as far as my ltft? i plan to replace my stock cat with a 'stock' cat so my cel might come on.. also for this resistor mod, what cel code relates to it? just one or two codes?
thanks guys...
Michael
99gs
HRC Stage IV 8-Injector Setup
2GNT Member #32
60637, RE: Rear O2 CEL code how to fix?
Posted by Jason_99ozGS, Oct-02-03 07:06 PM
>question if you put this resistor inline with the black wire
>to clear the cel code will it mess with my fuel trims in any
>way? as far as my ltft? i plan to replace my stock cat with a
>'stock' cat so my cel might come on.. also for this resistor
>mod, what cel code relates to it? just one or two codes?
>thanks guys...

It shouldn't mess with your fuel trims since the downstream O2 sensor (one after the cat) is only used the determine if your catalytic converter is working efficiently or not. The upstream O2 sensor (on the downpipe) however determines if the car is running lean or rich and fuel trims are adjusted based on what it reads.