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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » How to replace the O2 sensor on my 09 X « Previous Next »

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Hugie03flhr
Posted on Thursday, August 10, 2017 - 01:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have a check engine light that comes on if I run over 75-80mph for more than 4-5 miles. When it comes on there is NO change in performance and when I exit the highway it goes off within a minute.
I have checked the codes and the O2 sensor is the only thing that pops up. I got it off for a little while after using a few tricks I learned to clean the O2 but it didn't last.
So now I picked up the alternative 02 sensor that people have listed works well and I'm looking at the position of the O2.... How da Hell do you get to this thing??? I did some research and some say remove the rear shock, one said drop the engine down and another said I can snake my special O2 socket over the sensor and use a swivel extension to turn it. How have you guys done it???
Thanks BILL
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Teeps
Posted on Thursday, August 10, 2017 - 02:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

On my '06 Ulysses it was easily accessible, with a crowfoot o2 sensor socket, after removing the cooling fan.
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Electraglider_1997
Posted on Thursday, August 10, 2017 - 04:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just like Teeps suggests. Get the crowsfoot socket at Harbor Freight. I believe it is the 7/8" one. Verify the size on your new Bosch sensor. You'll have to remove your comfort kit shroud to get at the cooling fan. Take photos along the way so that things go back together correctly. Seems like the fan housing has to be rotated one way or the other to remove the fan. Then you should have access to the 02 sensor. The new Bosch sensor will have anti-seize on the threads and make sure it does. Have fun. By the way, You should be able to get that Bosch sensor at the auto parts store for about $20 and it is the exact same as the stock one. You get it from Harley and it will cost more than twice that amount and then some and it will be the same Bosch O2 sensor. One other thing. If you are running your oil too high on the dipstick it will blow up into your air cleaner and get burned by your engine and that will make your check engine light throw a Oxygen Sensor failure reading.
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Steveford
Posted on Thursday, August 10, 2017 - 06:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I don't know about Bosch, mine failed within the first 500 miles.
YMMV, as they say, but I wouldn't get another one.
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Hugie03flhr
Posted on Thursday, August 10, 2017 - 07:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks guys, I do have the crows foot socket from HF and I already picked up the Bosch sensor everyone recommends but I never ventured in this area. So let me see if I have this right. I pull the seat and there is a black cover that is sealed covering the rear shock I think or is that where the fan is hidden? Then I have to completely remove the fan or just unbolt it and push it to the side? I'm assuming the rear shock can stay put and I can get around it.
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Hughlysses
Posted on Thursday, August 10, 2017 - 08:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm pretty sure you'll have to at least disconnect the shock at the top to get to the fan, which means you'll have to support the bike.

As Ed would say on Wheeler Dealers, it's a lot of "fiddly" work.
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Hugie03flhr
Posted on Friday, August 11, 2017 - 10:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Haha! Love Edd China! I need to get this bike sorted!!! LOL
THANKS
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Portero72
Posted on Saturday, August 12, 2017 - 09:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My 09 had the same issue, repeatedly. I replace the sensor 3 times in 76k miles and the same thing always happened; CEL on at high speeds, off after slowing down. I finally figured out it was worn wiring somewhere. THAT is a pain to get to. So I bypassed the harness and went straight from the sensor, over the shock tower, to the ECM. Worked great after that. Never a repeat of that problem. Good luck.
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Steveford
Posted on Saturday, August 12, 2017 - 03:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You might as well just pull the shock out as that fan is a real bear to get in and out of the tunnel. It only goes in ONE WAY so a lot of patience is required no matter how many time you've done it.
I've had good luck with this one:
NTK NGK 21002

Same price as the Bosch, much smaller and no problems so far.
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Hugie03flhr
Posted on Saturday, August 12, 2017 - 03:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Portero72, the wiring on this bike is really starting to be a nightmare at only 17,000 miles. Thanks for the heads up on the possible wire short. I think you are right because it's very odd my cleaning trick didn't work and it only comes on at high speeds. Did you ever find the short or gave up and just bypasses it? I have both splices at the neck shorting and now this. WTF did Buell use light gauge wire to save an ounce of weight?
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Natexlh1000
Posted on Saturday, August 12, 2017 - 10:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

So you're thinking high frequency vibes get it to rub something?

My X1 would throw an O2 sensor code on the highway if the header wasn't tight.
The other "wire" of the sensor is the chassis ground via the header.
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Portero72
Posted on Sunday, August 13, 2017 - 09:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hugie-

After the second replacement I started to suspect it was NOT the sensor itself that was the issue. If you trace the wiring from the sensor back through to the loom, it quickly becomes a spaghetti nightmare. Bypassing the loom and going directly to the ECM seemed the easiest way to go. You just have to peel back the wrapping to access enough of the wire on the ECM side to make a good splice. Check the wiring diagram, but I believe it was a grey wire.
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Hugie03flhr
Posted on Monday, August 14, 2017 - 11:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks Portero72, I looked it up and it's pin 32 grey and violet wire. I'm going to bypass the O2 wiring and go straight to the ECM. I think I'm going to cut the wire completely because if it's still connected to the shorting wire it will still mess up the O2 signal. I'm luck, the wire I need to access is near the top of the harness but this harness is really tight. Doing a Google search I found a few other people running into the same problem.
Natex, exhaust is all tight and is stock. That was one of the first things I was looking for but gas mileage is normal and it's not running rich. Thanks!
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Hugie03flhr
Posted on Monday, August 14, 2017 - 02:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Update,
Wiring isn't my strong skill so I went back to "kiss" keep it simple stupid. I pulled up a few videos on how to test O2 sensors and then tested mine. It is very strange. I can get up to .8 Mv on a hot engine from idle to about 3000 rpm. After that I revved it past 3000rpm and the voltage went crazy! It was 0 than 2volts, back to 0 and so on. So we all know flying down the highway at 80mph puts us well over 3000 rpm, so I think I found my problem. I'll swap out the sensor tomorrow and report back. Thanks for all your help guys, I always wanted a Ulysses from day one! I finally got one and I love it! As Edd China would say, "I just need to get it sorted!"
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Hughlysses
Posted on Monday, August 14, 2017 - 02:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sounds like you conclusively identified the culprit. Hopefully that will straighten it out.
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Sagehawk
Posted on Monday, August 14, 2017 - 11:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

just curious as to the speeds yall are running at, thats really above closed loop, correct? what exactly does the o2 sensor and ecm do when you are out of closed loop? does the sensor fall out of the loop as you really arent using it at this time? i always thought that you would be running off of the map at that point. I'm just trying to understand the functions of all of this. also,, you fall off the sensor under other operating parameters, like hard acceleration, etc?
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Hugie03flhr
Posted on Wednesday, August 16, 2017 - 08:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sagehawk, from what I have learned over the years is these single wire O2 sensors only work when they get hot enough (over 300 degrees) under that it falls back to open loop. With stead strain on the engine at 3800 rpm, it should be in closed loop as the header temp reaches 600 + degrees. The ECM knows the engine is hot but it's not seeing readable volts from the sensor and throws a code. This is generally speaking, Buell might be its own animal.
Update, it took me over an hour to figure out how to set the bike up safely to remove the rear shock and get to the O2 sensor. Once again I resorted to KISS. It seems just jacking up on the muffler while on the kick stand works the best! I can't believe I didn't just do that from the get go. The operations will take place soon.
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Portero72
Posted on Wednesday, August 16, 2017 - 04:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Keep us in the loop.





SEE WHAT I DID THERE?!?!?!?!?
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