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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 > O2 sensors removed or not with catless DPs?



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      09-18-2009, 10:56 AM   #1
ssabripo
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O2 sensors removed or not with catless DPs?

do we leave the O2 sensors just hanging or unplug them altogether when running the DPs with the JB3 and O2sims?
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      09-18-2009, 11:56 AM   #2
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do u mean do you uninstall them from the DP?

the answer is no, you would have a massive exhaust leak.
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      09-18-2009, 12:43 PM   #3
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Plus you need the pre cat ones for closed loop control.
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      09-18-2009, 01:06 PM   #4
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Just get the BMS dpfix so you dont get any cells and limps.
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