THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
2Addicts
2Addicts
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
2Addicts | BMW 2-Series forum BMW 2 Series (F22) Forum BMW 2 Series Coupe and Cabriolet (F22/F23) General Forum PSA: You should probably consider changing out your O2 Senor

Post Reply
 
Thread Tools Search this Thread
      01-21-2025, 12:05 PM   #1
AmuroRay
Major General
AmuroRay's Avatar
3236
Rep
5,374
Posts

Drives: M235i
Join Date: Aug 2019
Location: Florida

iTrader: (0)

PSA: You should probably consider changing out your O2 Senor

While I was chasing down an issue that eventually presented itself to be a boost leak, I changed my Pre Cat O2 sensor off the advice of a throwaway thread from an poster who with a similar problem.

A comment was made that the O2 slowly decays over time, and won't immediately trip the CEL. One reason for the O2 wearing down quicker was using burble tunes, which send a bunch of unburnt fuel through the exhaust.

I can say the car does actually run a bit better since the O2 change (again, no codes prior to this) and even with my "tune" which has always caused lower fuel economy over the stock tune (regardless of driving habits) I'm getting the best fuel economy I've ever gotten.

Per the readout, I'm now around 340ish miles on a tank (I verified at least 325mi with a range of 15mi to go this morning, just to say I could)
Manual Calculations show my consumption was 26.8mpg - (325/12.1 Gallons) And this is of course with winter formulation gas, it's possible it could get better in the summer. Previous averages were around 23/maybe 24mpg with typically less than or up to 300mi - I think maybe 310 once or so.

Beyond MPG, smiles per gallon are up too. The car still has a boost leak (Oring wasn't set properly, but I ordered a completely new chargepipe. Old one is for sale for cheap!) but the throttle response and the power increase are not only felt from the seat of the pants (less clutch needed for moving from light to light) Virtual Dyno also noted a bit of an increase in power as well.

If you're getting up there in mileage, I'd suggest you change the sensor (about $100) and remove the dumb burble tunes.
__________________
Mods: Yes.
Quote:
Originally Posted by umizoomi View Post
As long 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 02:46 PM.




2addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST