Disable o2 sensor with resistance - MVAgusta.net
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post #1 of 15 (permalink) Old 02-28-2018, 05:50 AM Thread Starter
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Disable o2 sensor with resistance

Hello every body. I would like to disable my o2 sensor on my 1090rr 2011, because it not turn round under 4000rpm


Does someone have already try this. And wich value of resistance i need to use? For the warming circuit and the returning value?

Thanks

1090RR 2011
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post #2 of 15 (permalink) Old 02-28-2018, 05:57 AM
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The problem here is the ECU is looking for a constantly varying voltage indicating the 02 sensor is functioning. If it sees a constant value it will create a fault code and go to a fail safe mode.

You will need either a reflash to turn off the 02 sensor function, or an o2 sensor emulator. A fixed resistance won't work.

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post #3 of 15 (permalink) Old 02-28-2018, 06:27 AM
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The option is to have your ECU tuned to not look at the O2 sensor. There are a few places that do this when an exhaust system is installed. FWIW, I thought the O2 sensor is on in effect at LOW rpm.

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post #4 of 15 (permalink) Old 02-28-2018, 11:22 AM Thread Starter
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Ok thanks for your answer, are you sure about that a constant value with generate a fault code?

A mv agusta seller/reparator told me that a 20Mohm will be usefull for that, but it look really a big resistant for that.
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post #5 of 15 (permalink) Old 02-28-2018, 11:46 AM
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Look into the manual for the testing of the O2 sensor. That should give you the ohm readings.

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post #6 of 15 (permalink) Old 02-28-2018, 01:13 PM Thread Starter
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I have already look. They talk only about mVolts between 0 and 1000. If i knes the ampere (A) i could calculate it

Thanks for your help
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post #7 of 15 (permalink) Old 02-28-2018, 01:39 PM
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The narrow band o2 sensor is used by the ECM at less than 1/4 throttle and under about 4000 rpm. It is controlling fuel mixture at idle and low throttle openings only. You will get a fault code if the ECM doesn't see it working.

Some bikes will accept a fixed value resistance. Mostly pre-Euro3 Japanese models. MV and Ducati (and I think maybe BMW) ECMs are looking for varying voltage signals to confirm sensor function is normal. Same thing on cars.

I don't think you can use the DynoJet PowerCommander o2 Eliminator (a fixed resistance) on your bike. The "Tuner Car" guys use an Emulator that generates a fixed signal for lamda that tricks their ECMs....look for one of those.

Or get your ECM reflashed to ignore lamda.

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post #8 of 15 (permalink) Old 03-01-2018, 02:08 AM Thread Starter
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Is it possible to flash the ecu in my own? I have all the software guzzidiag and ecu reading / writing. But i never do that...

1090RR 2011
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post #9 of 15 (permalink) Old 03-01-2018, 05:04 AM
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Quote:
Originally Posted by ecosmeri View Post
Ok thanks for your answer, are you sure about that a constant value with generate a fault code?

A mv agusta seller/reparator told me that a 20Mohm will be usefull for that, but it look really a big resistant for that.
Time to find another seller/reparator. If that is their level of knowledge, I would not be using them to provide any type of mechanical service on my bike.
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post #10 of 15 (permalink) Old 03-01-2018, 07:20 AM
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Quote:
Originally Posted by ecosmeri View Post
Is it possible to flash the ecu in my own? I have all the software guzzidiag and ecu reading / writing. But i never do that...
While it is possible, if you have the right software, hardware, and knowledge of what you are doing, all of that is expensive.

There is a guy near me who can do what you need for under $500.00.

Here's the problem, and my constant plea: I have no idea what continent you are on, or planet for that matter. If you would kindly flesh out your profile a bit...I don't mean down to the color of your shingles, but at least a country would be nice. That way I could directo you to Rob, or Doug, or Max, or The-Man-in-the-Moon if you are closer.

Also, is that still the 5SM Magneti Marelli ECU?
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