What does an oxygen sensor do?
Thread Starter
|
Junior Member
Joined: Jun 2007
Posts: 19
From:
What does an oxygen sensor do?
Hi guys,
I recently replaced my servo on my 99 montero sport ltd and two days ago my service engine light is on i had it checked and was diagnosed of an oxygen sensor error but dealer tols me not to worry about i so now i would like to know what it really does...
Thanks in advance!
Charlz
I recently replaced my servo on my 99 montero sport ltd and two days ago my service engine light is on i had it checked and was diagnosed of an oxygen sensor error but dealer tols me not to worry about i so now i would like to know what it really does...
Thanks in advance!
Charlz
Senior Member
Joined: Nov 2006
Posts: 3,430
From: Colorado Springs, CO.
RE: What does an oxygen sensor do?
It depends on which one you're talking about. Some motors have 2 some have 4...are there any with more than that, perhaps 5? Anyway, there's an upstream and downstream. The upstream tells the computer if the motor is running lean or rich and will adjust the air fuel ratio accordingly. Then there's the downstream which only monitors the cat and that's it. The downstream does not affect motor performance, only the upstream.
Joined: Jan 2007
Posts: 1,757
From: The south
RE: What does an oxygen sensor do?
To what silver said, but in a nutshell.
The O2 sensor basically sends a readout to the ecu/pcm/whatever about how rich (too much fuel) or lean (not enough fuel) your vehicle is running.
It bases these reading on the exhaust gases flowing through the exhaust system.
Obviously, if it detects a problem, it tries to adjust the fuel/air mixture to correct it, but if it can't then you get a check engine light.
And if the O2 sensor goes out, you also get a CEL.
Boy.... some nutshell.
The O2 sensor basically sends a readout to the ecu/pcm/whatever about how rich (too much fuel) or lean (not enough fuel) your vehicle is running.
It bases these reading on the exhaust gases flowing through the exhaust system.
Obviously, if it detects a problem, it tries to adjust the fuel/air mixture to correct it, but if it can't then you get a check engine light.
And if the O2 sensor goes out, you also get a CEL.
Boy.... some nutshell.
Thread Starter
|
Junior Member
Joined: Jun 2007
Posts: 19
From:
RE: What does an oxygen sensor do?
ORIGINAL: Joshewuhh
To what silver said, but in a nutshell.
The O2 sensor basically sends a readout to the ecu/pcm/whatever about how rich (too much fuel) or lean (not enough fuel) your vehicle is running.
It bases these reading on the exhaust gases flowing through the exhaust system.
Obviously, if it detects a problem, it tries to adjust the fuel/air mixture to correct it, but if it can't then you get a check engine light.
And if the O2 sensor goes out, you also get a CEL.
Boy.... some nutshell.
To what silver said, but in a nutshell.
The O2 sensor basically sends a readout to the ecu/pcm/whatever about how rich (too much fuel) or lean (not enough fuel) your vehicle is running.
It bases these reading on the exhaust gases flowing through the exhaust system.
Obviously, if it detects a problem, it tries to adjust the fuel/air mixture to correct it, but if it can't then you get a check engine light.
And if the O2 sensor goes out, you also get a CEL.
Boy.... some nutshell.
Senior Member
Joined: Feb 2007
Posts: 140
From: USA-Denver, CO
RE: What does an oxygen sensor do?
A failing oxygen sensor should illuminate the Check Engine Light, has the light been back on since the dealer looked at it? As far as maintenance have you been changing theair filter/ fuel filter / PCV valve / spark plugs as needed?
I wonder if you just need to catch up on some maintenance items?
I wonder if you just need to catch up on some maintenance items?
Thread Starter
|
Junior Member
Joined: Jun 2007
Posts: 19
From:
RE: What does an oxygen sensor do?
The CEL light has now been off but i still have that sort of mild engine hesitation during acceleration..i recently changed sparkplugs air filter is also good, what else could be causing this?
Parts here for a US version montero sport is hard to find i actually got the servo from australia..
Parts here for a US version montero sport is hard to find i actually got the servo from australia..
Thread
Thread Starter
Forum
Replies
Last Post
