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Old 07-24-2009, 02:54 PM   #1
BGPunk2001
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Default What's the easiest way to check your O2 sensor?

My car is stumbling at idle, and hesitates while accelerating under 2k rpm. Above that, it runs like a champ all the way to redline.

It threw a code the other day, and it said it was a lean condition on cylinder bank 1. The Thing said that I could have a maf sensor issue, low fuel pressure, and O2 sensor malfunction, or vacuum leak....

I replaced the fuel filter because I hadn't in about 2 years or so. Then I took it to a mechanic I know, but he is going out of town for the next week. He said it sounded like I had a large vacuum leak or a bad O2 sensor.

I don't hear any loud sucking noises, so I doubt it is a leak.


I do know that when it is raining and I go over bumps, I seem to get this clunking right behind my seat, and sometimes it sounds like I have an aftermarket muffler on my car. Maybe the exhaust is loose in the middle, and maybe the rear O2 sensor is mounted there.


That would make sense because it started doing it after it rained the other day, and I got a whole hell of a lot of that banging right behind my seat. Maybe it got shorted out or fouled from water or something.


Sorry for rambling, but I may have just helped myself out a lot.




CN: HOW DO I TEST MY REAR O2 SENSOR?

PS: Its an 01 4cyl Camry.
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Old 07-24-2009, 02:56 PM   #2
RALLYT-WRX
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You really can't test them. When they go bad you should be getting a CEL for it.

Did you try cleaning your maf sensor yet?

Last edited by RALLYT-WRX; 07-24-2009 at 02:58 PM. Reason: It's a tarp......
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Old 07-24-2009, 02:57 PM   #3
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I think this is the wrong location to post this. I'm sure the rest of OT will let you know.
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Old 07-24-2009, 02:57 PM   #4
BGPunk2001
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Quote:
Originally Posted by matt.chase View Post
I think this is the wrong location to post this. I'm sure the rest of OT will let you know.
Its not a Subaru.
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Old 07-24-2009, 02:58 PM   #5
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sorry didnt notice it was for a camry.
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Old 07-24-2009, 02:58 PM   #6
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scan tool program for my laptop.

read the voltage from the sensor to see if it is within spec.
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Old 07-24-2009, 02:59 PM   #7
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Uninstall it from your car and install it in your anus.
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Old 07-24-2009, 02:59 PM   #8
BGPunk2001
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Quote:
Originally Posted by Qcanfixit View Post
scan tool program for my laptop.

read the voltage from the sensor to see if it is within spec.
Great, can you come over in an hour?
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Old 07-24-2009, 03:00 PM   #9
RALLYT-WRX
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Just replace it. It can't be that expensive.



Or buy a Miata.
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Old 07-24-2009, 03:00 PM   #10
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disconnect it and see if anything changes? i don't think a bad rear 02 will cause the issues you're describing though.... if it's anything like scoobs, it's only there to monitor, and don't really control much of the fueling.
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Old 07-24-2009, 03:01 PM   #11
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I thought rear o2 sensors are just to make sure the CAT is there. I don't think the second sensor has anything to do with the way the car drives.

edit: damn it honda!
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Old 07-24-2009, 03:01 PM   #12
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I'd try cleaning the MAF sensor first...easy and free.

And your o2 sensor isn't in your exhaust manifold?
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Old 07-24-2009, 03:02 PM   #13
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Quote:
Originally Posted by RALLYT-WRX View Post
Just replace it. It can't be that expensive.
I think they're like $50 a pop. $100 to fix nothing is pretty steep.
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Old 07-24-2009, 03:03 PM   #14
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Quote:
Originally Posted by BGPunk2001 View Post
I think they're like $50 a pop. $100 to fix nothing is pretty steep.
Try cleaning your maf yet?
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Old 07-24-2009, 03:03 PM   #15
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Quote:
Originally Posted by BGPunk2001 View Post
Great, can you come over in an hour?

sure hold on, let me get in my UFO...


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Old 07-24-2009, 03:05 PM   #16
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Quote:
Originally Posted by Qcanfixit View Post
sure hold on, let me get in my UFO...
I new it!
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Old 07-24-2009, 03:06 PM   #17
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Wait a minute. Did you spool it at 12mph.......... again?
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Old 07-24-2009, 03:08 PM   #18
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Quote:
Originally Posted by RALLYT-WRX View Post
Try cleaning your maf yet?
A - No, right now i'm at work.

Quote:
Originally Posted by RALLYT-WRX View Post
Wait a minute. Did you spool it at 12mph.......... again?
B - WAT?
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Old 07-24-2009, 03:09 PM   #19
subysleeper
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You probably spoolled at 12mph.
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Old 07-24-2009, 03:09 PM   #20
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When the O2 sensor failed in my Forester I was getting some MAF code. Buy an after market replacement, it should be a lot cheaper than OEM.
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Old 07-24-2009, 03:10 PM   #21
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Your MAF, it may be dirty. Have you considered removing said dirt ?
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Old 07-24-2009, 03:10 PM   #22
Wagon Of Fury
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Should have got the diesel
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Old 07-24-2009, 03:13 PM   #23
BGPunk2001
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HOLY ****ING BALLS!!!! An O2 sensor is $68 for my ****ing car!!!!
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Old 07-24-2009, 03:13 PM   #24
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Quote:
Originally Posted by BGPunk2001 View Post
A - No, right now i'm at work.



B - WAT?
A - Leave work early, afterall it's Friday. Clean MAF.

B - You can't be serious.
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Old 07-24-2009, 03:14 PM   #25
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today is friday? sweet
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