O2 sensor lazy?

SC300T · 08-10-2018, 06:32 PM

Anyone have an o2 sensor get marginal without codes? My 2013 N55 F10 with 35k miles has a hesitation at lower to mid rpms and light throttle.

In my early days I had a wideband o2 on a 2Jz that got fouled by lead. The first symptom would be lazy or erratic readings at low throttle settings.

On my F10, I reset the 2 Lambda adaptation settings, and the throttle response immediately improved to normal, but each time I would start the car, the throttle response would become more erratic and lazy.

I'm thinking that the Lambda reset brought back a stock setting that gradually gets off the rails due to bad o2 data.

Does this sound reasonable? How often do N55 o2 sensors go bad? Has anyone had a similar situation? Looks like the main wideband on the N55 is about $225. from Tischer.

Thanks!

SC300T · 02-25-2019, 08:02 AM

FYI, this was the primary 02 sensor going bad. Replaced it and hesitation / stutter on initial throttle input is totally gone. No codes, nothing that a dealer could see. If you have an AT, I doubt you'd ever notice it, but with a 6MT, that initial push on the gas is very noticeable with every shift. 2013 535i 6mt with 40k miles.

08-10-2018, 06:32 PM	#1
SC300T Private First Class 26 Rep 116 Posts Drives: 13 E92 M3, 540xi, 535ix GT Join Date: Dec 2012 Location: Cincinnati OH iTrader: (0)	O2 sensor lazy? Anyone have an o2 sensor get marginal without codes? My 2013 N55 F10 with 35k miles has a hesitation at lower to mid rpms and light throttle. In my early days I had a wideband o2 on a 2Jz that got fouled by lead. The first symptom would be lazy or erratic readings at low throttle settings. On my F10, I reset the 2 Lambda adaptation settings, and the throttle response immediately improved to normal, but each time I would start the car, the throttle response would become more erratic and lazy. I'm thinking that the Lambda reset brought back a stock setting that gradually gets off the rails due to bad o2 data. Does this sound reasonable? How often do N55 o2 sensors go bad? Has anyone had a similar situation? Looks like the main wideband on the N55 is about $225. from Tischer. Thanks!
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02-25-2019, 08:02 AM	#2
SC300T Private First Class 26 Rep 116 Posts Drives: 13 E92 M3, 540xi, 535ix GT Join Date: Dec 2012 Location: Cincinnati OH iTrader: (0)	FYI, this was the primary 02 sensor going bad. Replaced it and hesitation / stutter on initial throttle input is totally gone. No codes, nothing that a dealer could see. If you have an AT, I doubt you'd ever notice it, but with a 6MT, that initial push on the gas is very noticeable with every shift. 2013 535i 6mt with 40k miles.
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