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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through November 17, 2009 » I keep getting LOW FUEL SYS ERROR!! « Previous Next »

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Scott0827
Posted on Thursday, November 12, 2009 - 01:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have an 09 CR With the 141 flash, I keep getting LOW FUEL SYS ERROR every time I fill the bike up. It has been doing this after the flash! After I fill the bike and turn on the key the fuel light is lit and the engine light is lit. Is this bad????
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Jdugger
Posted on Thursday, November 12, 2009 - 01:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check your vent tube make sure it's not pinched.
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Scott0827
Posted on Thursday, November 12, 2009 - 02:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Jdugger, My vent tube seems to breath well, I usually pull the gas cap after a ride so gas does not drip out the tube... I will check it anyway.
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Zac4mac
Posted on Thursday, November 12, 2009 - 04:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It's the level sensor out-of-range that sets the DTC.
Mine has been doing this for a while and will go in for diag and repair soon.

Only happens when it's cold outside.
I live in Colorado, mornings are near freezing now.

Zack
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Scott0827
Posted on Thursday, November 12, 2009 - 04:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Zac,thanks for responding to my post. What is the fix for this???
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Zac4mac
Posted on Thursday, November 12, 2009 - 04:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

AFAIK the only fix is a new fuel pump.
Gotta see what Service comes up with.
Very hard for me to let go and drop her off tho.

I have some warranty repairs to be completed also.

She's only been "in the hospital" once...

Z
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Scott0827
Posted on Thursday, November 12, 2009 - 09:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I am getting the latest flash tomorrow, I will have them check on it then... Thanks a bunch!!!
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Easyrider
Posted on Friday, November 13, 2009 - 01:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I think it is low fuel signal from the lamda.. Only a bad discription... What looks like there is something very wrong..

Zack, I think what you should do, don;t fix it.

Swap the stock ECM with another one, (race ECM) and see if the fault code exits)

Try this too see if I am righr.....

I think there will be no Trouble code. Could wetter wilt +++ the need of Fuel.
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Dirty_john
Posted on Friday, November 13, 2009 - 02:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

search the forum, there have been a few reports of this occurring, it is thought to be cold fuel taking the resistance/voltage of the fuel level sensor out of range and a fault code/CEL being posted, an annoying issue that happened to me last winter, I am waiting to see if this occurs this winter and if it does than a warranty claim will be made - spoils a great bike
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Zac4mac
Posted on Friday, November 13, 2009 - 05:48 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The fuel level sensor is a thermistor.
It is supposed to measure between 800-1400 Ohms, IIRC.

It reads 2200 Ohms when cold which is outside the limits and sets the B1005 DTC.

Easiest fix would be to expand the limits in software in the ECM.
Barring that, the next viable fix is replace the out-of-range sensor, which is integral to the fuel pump.

Zack
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Easyrider
Posted on Sunday, November 15, 2009 - 02:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Zac, Make the gold start enrichment utill 65 degree much bigger problem solfed
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Zac4mac
Posted on Sunday, November 15, 2009 - 09:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm not following you, Dris.
This isn't a fuel-mixture-burn issue.
It's a level(amount) in-the-tank-sensor problem.

The fuel level sensor seems to do it's job tho, when level gets low, just the LFL, no CEL.
I got Loretta checked in to Service yesterday, good timing, got about 8" of snow last night.

Will keep all apprised of the prognosis.

Zack
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Scott0827
Posted on Sunday, November 15, 2009 - 09:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Zac, Please keep us informed,I would like to add that after I got the 152 flash I filled the bike and no CEL???
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Zac4mac
Posted on Sunday, November 15, 2009 - 08:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I asked Max to get the error to repeat, then do the new flash and see if that fixes it.
I'd really rather not have my fuel pump replaced unless it's necessary.

So far, he's working on the clutch dribble and replacing the fork leg.

Zack
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Zac4mac
Posted on Monday, November 16, 2009 - 04:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Max checked the sensor and it was 2000 Ohms.
He ordered a new fuel pump after a discussion with "Tech Services".

Z
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Dwiggs
Posted on Thursday, December 03, 2009 - 08:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Zack,

Did the new fuel pump fix the problem?

I rode home from work the other night in 35 weather and was promptly greeted with the LOW FUEL SYS ERROR. I discussed this with my dealer (as I was scheduling my appointment for new tires and the latest flash), but they did not seem to have encountered the issue before.
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Zac4mac
Posted on Thursday, December 10, 2009 - 09:17 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

New (reputable) word is, the IC has a bug up to SW6.1.
New IC with 6.2(2008-2009) or 7.1(2010) will fix the problem.
Anything else is a "band-aid".

Zack
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