Another 335, another o2 sensor problem

Jake1z · 11-06-2020, 07:05 AM

Just picked up an 09 335xi 2 door 6mt. Did the normal dci, charge pipe, new valve cover and gasket, one step colder plugs, down pipes, jb4, mhd bef. And have had nothing but issues with 02 sensor codes like my last car had. Going to order a bank two front sensor today. There's the codes that keep popping up think it's just the sensor or another issue?

Wolf 335 · 11-06-2020, 07:14 AM

This all came after you did all that other work?

Did you check that the O2 sensors are plugged back in correctly after valve cover work?

Jake1z · 11-06-2020, 10:36 AM

Started after the downpipes I believe. I was careful with the sensors marked them so I knew where to put them back in at. I'm picking up a new Bosch bank two sensor from pep boys today. I'll see if it makes a difference. My last car had never ending issues too. Mostly because of a cracked valve cover. This once's brand new so it shouldn't be that. But I might have to smoke test it to make sure

relative4 · 11-06-2020, 01:29 PM

Sounds like B2S1 got dinged in the DP swap. Everybody does it at some point, they can be fragile little princesses.

11-06-2020, 07:05 AM	#1
Jake1z Private First Class 5 Rep 107 Posts Drives: 2008 335xi e92 Join Date: Oct 2013 Location: 732 NJ iTrader: (1)	Another 335, another o2 sensor problem Just picked up an 09 335xi 2 door 6mt. Did the normal dci, charge pipe, new valve cover and gasket, one step colder plugs, down pipes, jb4, mhd bef. And have had nothing but issues with 02 sensor codes like my last car had. Going to order a bank two front sensor today. There's the codes that keep popping up think it's just the sensor or another issue? Attached Images __________________ Black 09 335xi coupe 6MT Down pipes, Charge Pipe, DCI, JB4, 2 Step, BEF, 3.5 Bar,
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11-06-2020, 07:14 AM	#2
Wolf 335 Brigadier General 2341 Rep 3,539 Posts Drives: 2007 E92 335i Join Date: Aug 2012 Location: GTA - Greater Toronto Area iTrader: (0)	This all came after you did all that other work? Did you check that the O2 sensors are plugged back in correctly after valve cover work?
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11-06-2020, 10:36 AM	#3
Jake1z Private First Class 5 Rep 107 Posts Drives: 2008 335xi e92 Join Date: Oct 2013 Location: 732 NJ iTrader: (1)	Started after the downpipes I believe. I was careful with the sensors marked them so I knew where to put them back in at. I'm picking up a new Bosch bank two sensor from pep boys today. I'll see if it makes a difference. My last car had never ending issues too. Mostly because of a cracked valve cover. This once's brand new so it shouldn't be that. But I might have to smoke test it to make sure __________________ Black 09 335xi coupe 6MT Down pipes, Charge Pipe, DCI, JB4, 2 Step, BEF, 3.5 Bar,
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11-06-2020, 01:29 PM	#4
relative4 Major 611 Rep 1,272 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	Sounds like B2S1 got dinged in the DP swap. Everybody does it at some point, they can be fragile little princesses.
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