Thread: O2 spacers?
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      10-14-2020, 05:31 PM   #6
M340_pilot
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Drives: 2020 M340i
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Quote:
Originally Posted by carguy19 View Post
Is it safe to "fool" the 02 sensor?

They are pretty important to get the air fuel ratio correct. I don't know if I'd want to mess with that personally. Thats just me.

I think you can fix this with a flash or a JB4 properly and keep the o2 sensors working the way they are designed.

Good luck with it either way you decide to do it.
JB4 doesn't offer that capability but a tune def can.

Someone can correct me if I'm wrong but the sensor before the cat is for a/f ratio regulation; the sensor after/in the cat is for emissions.

Fixing aftermarket (catted or catless) downpipe issues with a tune is just turning "off" the rear sensor
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