Buick LaCrosse (2005 - 2013) - Replace the oxygen sensor

Do you need to Replace the oxygen sensor
on your Buick LaCrosse (2005 - 2013) but don't know where to start? This video tutorial shows you step-by-step how to do it!
Our Buick LaCrosse (2005 - 2013) manual covers petrol engines, and includes videos for some of the most common jobs, which you can see here in this playlist. Get the full manual haynes.com/en-...
What's covered:
Buick LaCrosse Haynes Repair Manual for 2005 thru 2013
PLEASE NOTE that this manual is intended for vehicles built to US specifications and do not cover diesel models unless specifically stated. Although it is useful when the products or systems are similar to those in other markets, there may still be significant differences, especially in areas concerned with safety and emission control.
Exclusions:
Does not include information specific to eAssist models

[@AdvancedMechanics]

I would add that your working on the 2.4l to the title description.

[@verlindale]

How do you know if you have an upstream or downstream?

[@AdvancedMechanics]

The o2's are mounted before and after the catalytic converter. The ecu takes the data to determine the cats efficiency. The upstream is before the cat and is used for fuel trim corrections mainly, and the downstream is after the cat, normally that data is used for emission control.

[@TreSparks]

What did you push to remove the red plastic piece mine won’t come off and is starting to bend

[@holdingcopsaccountable6554]

Needle nose.

[@benjaminrodriguez7625]

How to replace a crankshaft sensor

[@user-gh4is7wf3c]

Well, that was a bust. Didn't look like my '06 engine.