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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » Red Check Engine Light « Previous Next »

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Geoff
Posted on Tuesday, March 09, 2021 - 11:50 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The red check engine light on my '06 Uly comes on occasionally if I ride hard and push it to high RPM. Sometimes it turns on, sometimes not. There's no consistency. The light turns off in about 15-20 seconds or if I stop and restart the engine. The bike runs great, even when the light is on. The previous owner re-mapped the (stock) ECM and installed a Buell race muffler. The exhaust valve actuator operates, but the cable was removed. Battery and ECM cable connections are clean and tight. Any idea what I should check? I tried using the site's Search function, but it never works.
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Teeps
Posted on Tuesday, March 09, 2021 - 12:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Probably the O2 sensor.
My'06 would do the same, as you say occasionally.
I replaced the O2 sensor and the red engine light would still come on... at times.
Usually noting to worry about.
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Swanthog
Posted on Tuesday, March 09, 2021 - 12:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I've seen this on my '06 Uly but only when pushing hard up a long steep grade in the heat with a STIFF head wind.
I was around 200 miles out and had never seen the bike do this before. I pulled over, shut the bike off, and restarted.
The light was gone, so I babied it home and have never seen it again.

Others on the forum mentioned this might happen operating in the conditions I was while working the bike hard.
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Vortec57
Posted on Tuesday, March 09, 2021 - 02:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The engine light on my 06 comes on randomly, a lot. Ive never had a running issue, and it always turns off if I shut the bike off and restart.

I chalk it up to something like the Y'd wires for the turn signals that break at the wire connection. Though I havent been able to trace it back. I also have a random neutral light that will come on when the bike is in gear running down the highway.
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Tpehak
Posted on Tuesday, March 09, 2021 - 06:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check the error codes. See electrical manual for this procedure if you do not have Bluetooth dongle.
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Lew360
Posted on Tuesday, March 09, 2021 - 06:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My '06 did this as well. Ended up being the exhaust valve actuator. My Buelltooth has paid off in just that one light. It actually fixed itself but a have an updated '08 actuator on hand just in case.

(Message edited by lew360 on March 09, 2021)
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Swanthog
Posted on Tuesday, March 09, 2021 - 08:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I should have mentioned before, I am running the race ECM with O2 delete and BuellTooth Baro sensor.
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Tootal
Posted on Friday, March 12, 2021 - 09:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Did you figure it out yet? My light started coming on at 75 mph but if I dropped 5 mph it would go out. I just kept riding with no issues but the light. I checked the codes and the O2 sensor was bad. I replaced it and no more light. Sounds like that's your issue but we always like to know what folks find.
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Geoff
Posted on Friday, March 12, 2021 - 10:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I removed and cleaned the battery cable connections. Also sprayed both ECM connectors with electrical contact cleaner. Will take a test ride this weekend.
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Geoff
Posted on Friday, March 12, 2021 - 05:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Took a 31-mile ride today. Pushed the bike hard a few times. The check engine light did not turn on. Outside temperature was 51 degrees. Ilm anxious to see if the light turns on in warmer weather.
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Sharkguy
Posted on Monday, March 15, 2021 - 08:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I hope you mean the amber light, I believe the red light is low oil pressure.
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Pushr0d
Posted on Tuesday, March 16, 2021 - 09:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yeah - I was going to ask about that.

I just found out you get a (amber) CEL if your charging system fails. 'Low voltage'.

Good to know, I guess.
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Mark_weiss
Posted on Tuesday, March 16, 2021 - 09:59 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

CELs used to be red. I'm not certain when they changed to amber. Certainly by 2008.
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Zane
Posted on Thursday, March 18, 2021 - 01:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My 09 XT does this when the O2 sensor is going.
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