O2 Sensor wire over twisted :( - Honda CBR1000 Forum : 1000RR.net
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post #1 of 15 Old 11-01-2012, 08:51 AM Thread Starter
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O2 Sensor wire over twisted :(

Hey Guys,

So I got home yesterday around 7p and the 2 bros was there

I laid down and fell asleep and woke up at 1am, I go to work usually at 6am so I thought I'd put the 2 bros on, I was dumb and sleepy and over twisted the o2 sensor when taking it off of the oem exhaust, and messed up the wires I hooked it up to the 2 bros pipe and got a check engine light 2 long and 3 quick flashes.

My Q is; Would it affect permormance? or it's just for emissions stuff?
I'll try to hook wires back to it when I get home this evening.
I've been reading for about 2 hours and can't find the answer.

Should I worry about it, or just ride it as is? I can't afford and won't put any pc or anyting in the future. Thanks for your help.
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post #2 of 15 Old 11-01-2012, 12:44 PM
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This just happened to me the other day. I have the '12 model where the 02 sensor is on the muffler.

I too got a check engine light.. Mine was because the Servo flywheel was not in the stock position and the flapper on the exhaust was not closing or opening properly because i routed the cable wrong on the exhaust servo flywheel/whee. I also thought it was because i may have over twisted getting the 02 sensor off/on the OEM muffler.

**[ When you rotate the servo wheel to remove the exhaust cable from the servo wheel. You have turn it back to the position it was before starting the engine** To reset my check engine light i just disconnected the battery for 3 days. I did 3 days which are my heavy work day where i work all day and i knew i wasnt going to be doing anything on the bike. So far my check engine light has not come on again. So i guess the 02 cables are fine.

Below is the help i recieved from another member Rocketj21. The other picture was one i fixed the problem and where the stock postion is on my '12.

Quote:
Originally Posted by Rocketj21 View Post
Take the cable off cycle the key on and off this should reset the servo, remember this position
Now rotate the servo wheel in the direction of the red arrow until the holes are in the 12 o'clock position more or less,
this is just to help you get the cable hooked up

The cable should follow the path of the yellow line over the top of the servo wheel
Put the cable into the hole that it is in now, when you cycle the key the servo should reset if not turn it back to its starting position


Last edited by cbr100rr; 09-28-2013 at 05:34 PM.
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post #3 of 15 Old 11-01-2012, 12:50 PM
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One more thing. IF you did turn the servo wheel back to the stock position after removing the exhaust cable and before starting the bike. Then it might be the O2 sensor.

CHECK the servo wheel. I think thats your check engine light. IF its not in its stock position the light will come on. Other then that your fine, i think.

DONT FORGET TO DISCONNECT your battery to reset/turn off the check engine light..... IDK if on bikes once the problem is fixed the computer will recognize that and turn it off on its own. I went w/ disconnecting the battery, it works on cars that way so i did it on the bike. my 2 cents.

Quote:
Originally Posted by cbr100rr View Post
I followed your instructions to the letter and it worked!!!

At first i was cycling the key n wasnt doing anything then i flicked/pushed the start button w/o actually starting the bike and i felt/heard the wheel move to the 12 oclock position. Then i cycled the key and it went to the position it was in the previous picture. From there the wheel wasnt hard to turn anymore like before. I continued following your instructions and got the cable in the right way. Now its working.

I started the bike after it warmed up.. i revved it a little to see if it would open..and it does. THANK YOU SO MUCH FOR YOUR HELP.

THANK YOU Rocketj21 FOR TAKING THE TIME TO DO THAT DIAGRAM IT REALLY HELPED ALOT. THANK YOU

Last edited by cbr100rr; 11-01-2012 at 01:12 PM.
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post #4 of 15 Old 11-01-2012, 05:11 PM
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if you eliminate the servo, you need a servo eliminator...
pdfruth's DIY Exhaust Servo Replacement Module (ESRM)
$30 is better than $140 right
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post #5 of 15 Old 11-01-2012, 05:23 PM Thread Starter
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cbr100rr, I removed the cable from the servo about a week ago, no check engine light, but now that I put a 2 bros exhaust, I believe I messed up the wires on the o2 sensor, it has nothing to do with the servo as I didn't even touch it, and oem exhaust cable was removed from it and I've been riding all good.

Hey africaguide, do you know if eliminating the o2 sensor would affect anything performance wise? if not i don't mind the check engine light tho that it's very annoying to see.
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post #6 of 15 Old 11-01-2012, 05:31 PM
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yeah a after market exhaust eliminates the servo, unplugging it should give you a light. not having an O2 sensor could give you a rough idle and/or bad fuel mileage.
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post #7 of 15 Old 11-01-2012, 07:07 PM
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Why not just repair the damaged wires? Not all that difficult.
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post #8 of 15 Old 11-02-2012, 09:59 AM Thread Starter
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Quote:
Originally Posted by 01010101 View Post
Why not just repair the damaged wires? Not all that difficult.
I'll try that, Also I did not unplug the servo, it should take the light away. I'll let you guys know.
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post #9 of 15 Old 11-03-2012, 12:11 AM
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When did they start putting O2 sensors on US spec bikes? My 08 didn't come with one.
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post #10 of 15 Old 11-03-2012, 12:54 AM Thread Starter
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2012 models as far as I'm aware of all of them have in the mufflers mid pipe. my 2 bros slip on for the 2012 came with an open hole for it.


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