Fitted exhaust, now lambda sensor error - MVAgusta.net
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post #1 of 28 (permalink) Old 06-06-2018, 03:25 AM Thread Starter
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Fitted exhaust, now lambda sensor error

Hi all,

First things first - I searched for this but couldn't find a result specific to my situation...

So, I recently fitted a slip on from Fresco. Amazing quality, no problems with fitment.

No problems on the first 30 mile ride, then I returned home and fitted the insert that goes into the main silencer as the exhaust was too loud for me, and once again refitted the exhaust.

On the next day's ride the lambda sensor error came up. Bike still seems to ride as normal, I think, so not sure what's going on here. I've checked the sensor and plug and all seems fine there.

I didn't touch it at any point during installation, nor was I heavy handed with getting the exhaust on, so I can't imagine I disturbed the sensor in any way.

Any thoughts?

Thanks,
Nick
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post #2 of 28 (permalink) Old 06-06-2018, 05:58 AM
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It is possible the sensor overheated with the new silencer, and is damaged. The ECU is not seeing the signal being generated that it needs.

You could try a new o2 sensor....they are all basically the same construction/function. Buy an auto part and splice your connector to it.

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post #3 of 28 (permalink) Old 06-06-2018, 06:16 AM Thread Starter
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Thanks for the reply. The sensor is fixed to the header downpipe, so how would changing the silencer affect this? Surely the sensor wouldn't know what was happening downstream of its location in the header?
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post #4 of 28 (permalink) Old 06-06-2018, 06:23 AM
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Yes it can..... exhaust system back pressures have been changed. From exhaust port all the way down.

Anyway, If the sensor connection/wiring is good, and the heated side is getting its supply voltage and ground, and you have a fault code for the sensor....then the generated +/-1 volt signal is not being read by the ECU.

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post #5 of 28 (permalink) Old 06-06-2018, 06:34 AM Thread Starter
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OK.

Why would the new exhaust have damaged the sensor?

And where would one get a new non-MV sensor from?

Thanks!
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post #6 of 28 (permalink) Old 06-06-2018, 07:52 AM
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Don't know that the new exhaust did...but that is the only thing you changed.

Take your sensor out and carry it to an auto parts store. You may need to splice your connector onto what ever you find. It is a narrow band heated oxygen sensor. Buy a Bosch brand.

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post #7 of 28 (permalink) Old 06-06-2018, 08:38 AM Thread Starter
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Thanks, so any kind of Bosch heated sensor will do, as long as it fits?
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post #8 of 28 (permalink) Old 06-06-2018, 11:25 AM
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Quote:
Originally Posted by TruffleShuffle View Post
Thanks, so any kind of Bosch heated sensor will do, as long as it fits?
I'm not going to guarantee it, but they all work the same way. The big difference is usually in the wiring connectors. Sometimes the length of the part that goes into the bung on the pipe. That needs to match.

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post #9 of 28 (permalink) Old 06-06-2018, 03:09 PM
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Quote:
Originally Posted by esq'z me View Post
I'm not going to guarantee it, but they all work the same way. The big difference is usually in the wiring connectors...
The "universal" Bosch Lambda Sensor
This one for instance

works fine on almost all cars but might not be an easy fit.
And costs around $44.


OTOH
the vanilla MV Agusta Brutale 800 O2 Oxygen Sensor 8A00B9339 LAMBDA DELPHI FEELER sells for about $44.


I would go back to the stock exhaust.
Confirm that the OEM sensor is truly cooked.

Then shell my $44 on a new plug&cook MV compatible Delphi part.


Same cause, effect and all that.

Dragster
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post #10 of 28 (permalink) Old 06-06-2018, 03:17 PM Thread Starter
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Quote:
Originally Posted by Arcimboldo View Post
Quote:
Originally Posted by esq'z me View Post
I'm not going to guarantee it, but they all work the same way. The big difference is usually in the wiring connectors...
The "universal" Bosch Lambda Sensor [IMG class=inlineimg]http://www.mvagusta.net/forum/images/MVagusta_net_2016/smilies/tango_face_glasses.png[/IMG]
This one for instance

works fine on almost all cars but might not be an easy fit.
And costs around $44.


OTOH
the vanilla MV Agusta Brutale 800 O2 Oxygen Sensor 8A00B9339 LAMBDA DELPHI FEELER sells for about $44.


I would go back to the stock exhaust.
Confirm that the OEM sensor is truly cooked.

Then shell my $44 on a new plug&cook MV compatible Delphi part.


Same cause, effect [IMG class=inlineimg]http://www.mvagusta.net/forum/images/MVagusta_net_2016/smilies/tango_face_grin.png[/IMG] and all that.
How is that only $44 when mv are charging £180 (!!!!!) for the same part??

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