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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > OFT - Rear o2 Adjustments



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      10-26-2013, 11:31 AM   #1
mapleridge
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OFT - Rear o2 Adjustments

Hi All,

just wondering if anyone with the open flash tablet is able to reduce the o2 sensitivity with catless pipes to not throw a code and pass emissions via obd scanning.
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      10-26-2013, 12:43 PM   #2
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You can't reduced O2 sensitivity but you can eliminate/block the code.
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      10-26-2013, 12:53 PM   #3
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You should be allowed to pass with one monitor not ready - in my case that was the downpipes. EVAP is annoying to get to be ready, you need to have at least 2 cycles of cold start-drive 20 min-stop and idle for 5 min.
I could not find a way to change the theshold for the 02s but you will need to disable the codes.
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      10-26-2013, 01:25 PM   #4
mapleridge
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Ok. Thanks for the responses. I get it. If you didn't notice, I have an n52. Since the tablet is going to be released for our engine as well I wanted to see what you guys were doing. Basically you shut the sensor down like AA does with their off road tune.

Interestingly though, the tuning company Evolve can adjust the reading to not throw a code but still show ready. There must be a way.
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      10-26-2013, 01:47 PM   #5
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Good luck with oft release for n52...
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      10-27-2013, 02:46 PM   #6
mapleridge
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Quote:
Originally Posted by enrita View Post
Good luck with oft release for n52...
Not sure what that means. Please elaborate. Do you think it won't work well or it won't be released? Shiv said it should be done in a few weeks and he told us about it over a month ago.

Back OT, if anyone has any idea how to show cat readiness with catless dp's that would be great to know.
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