Help: Replace O2 Sensor
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Evolving Member
Joined: Feb 2005
Posts: 114
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From: Brampton
Help: Replace O2 Sensor
Hi, I have a 2008 2.0L Lancer. Is it easy to replace the FIRST (before cat) o2 sensor? I didn't go right underneath the car, I did a quick oil change, but it was too cold out to look around for the sensor. I have about 145 000 km on it, so I think I'll get some more mileage and performance replacing the sensor.
Is it accessible from the bottom of the car or in the engine bay? Is there cross-members or covers that have to be removed in order to get to it?
Why hasn't anyone done a how to on this yet? COME ON PEOPLE lol.
Is it accessible from the bottom of the car or in the engine bay? Is there cross-members or covers that have to be removed in order to get to it?
Why hasn't anyone done a how to on this yet? COME ON PEOPLE lol.
Thread Starter
Evolving Member
Joined: Feb 2005
Posts: 114
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From: Brampton
Popular Mechanics says this:
http://www.popularmechanics.com/cars...enance/4219927
It's always the upstream sensor ("Bank 1, Sensor 1") that the powertrain management system pays attention to in order to fine-tune the proper 14.7:1 air/fuel ratio (aka lambda). Lambda is the Greek character used to designate that perfect stoichiometric ratio. And although the modern oxygen sensor has a 100,000-mile life expectancy, when it gets old and lazy you'll begin to notice a drop in fuel economy. More extreme cases of malfunction will lead to driveability issues and, eventually, to an illuminated Check Engine light when the frequency of the sensor's signal slows to a crawl.
Last edited by mrblob20; Mar 9, 2011 at 04:40 PM.
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From: Daytona Beach/Melbourne, Florida
if you want to replace that sensor, youll have to either:
a. take to the dealer (expensive)
b. find a 4 wire sensor and splice it in yourself. there is no connector that you can just unplug to release the O2 sensor.
a. take to the dealer (expensive)
b. find a 4 wire sensor and splice it in yourself. there is no connector that you can just unplug to release the O2 sensor.
Newbie
Joined: Mar 2015
Posts: 3
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From: riverside
hi guys i need help i received a a bank 1 sensor 2 code . The did research different websites have different info . Does a lancer 2009 gts have 2 or 3 sesors ?? and does anyone know the locations . I can see one right at the catalytic is that number 2?
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