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Old 01-11-2006, 02:57 AM   #1
Azn-Jap STI
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Default WTB: stock o2 sensor

Hey guys! As you guys remember, I recently posted up a thread regarding my engine check light and why it was lit. Well, my cousin, who's a Rally Driver, came over to visit and I asked him why this was happening. He told me that my O2 Sensor was malfunctioning. He said I should buy a new O2 sensor. Oh yeah, I've also noticed that my gas consumption has increased dramatically, and it's funny because I drive mainly within the city. He said that the O2 sensor was also causing this to happen. So... here's the question: Does anyone have an O2 sensor that they don't need? Perhaps a used stock one that's in good condition? I want to buy it!! lol
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Old 01-11-2006, 04:39 AM   #2
fukamoto
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You are best off buying it straight from the dealer even though they are not cheap. It defeats the purpose of buying a used o2 sensor when you are replacing a malfunctioning one.

BTW, I hope you realize that your cousin is GUESSING that it is the O2 sensor. I'd hate for you to throw down a few bills only to realize it is not related.

My advice, which I'm sure most guys will back me up on...don't replace it just yet. Drive your car until you get another CEL. Then get the CEL code pulled rather than disconnecting the battery. Disconnecting the battery to clear the code is the WORST thing you can do. Just get it checked. Shouldn't be more than $20 at any store, hell, even Canadian Tire...or ask some Subaru guys to do it for a case of beer. Once you get the code, THEN you can diagnose it and fix it up.

No point spending money on something which might not fix the problem.
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Old 01-11-2006, 04:50 AM   #3
red_soul_D
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your O2 sensor is obviously not the problem....it is simply a catilytic deficiency code...i had that on my car...makes you run hella rich (ie. wastes more gas) and throws CEL when rev'd hard....replacing it will do nuthing...you need a CEL fix or engine management
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Old 01-11-2006, 04:53 AM   #4
KIMUTAKU
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city driving involves more stop and go, thus more gas consumption, i wouldn't be surprised..
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Old 01-11-2006, 04:17 PM   #5
Azn-Jap STI
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Quote:
Originally Posted by red_soul_D
your O2 sensor is obviously not the problem....it is simply a catilytic deficiency code...i had that on my car...makes you run hella rich (ie. wastes more gas) and throws CEL when rev'd hard....replacing it will do nuthing...you need a CEL fix or engine management

so is it possible to get it fixed at subaru?? or is there something easier? a shop maybe?
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Old 01-11-2006, 04:50 PM   #6
GlobalWaste
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IF it is a cat inefficiency code, you'd need either a resistor fix, mechanical fix, or EM which would get rid it... a new O2 sensor wouldn't help you in that situation.

Also a subaru dealership wouldn't do any of the above for you, they'd probably just tell you to put your OEM exhaust back on
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Old 01-11-2006, 04:52 PM   #7
Gethin
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Guys, maybe he's talking about the front O2 sensor not the rear one
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Old 01-11-2006, 05:50 PM   #8
Azn-Jap STI
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no its the back one. i have a catless UP but it had no problem for such a long time. it has to be the back one.
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Old 01-11-2006, 07:03 PM   #9
Gethin
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You have one in your header too.......the rear one is used for long term fuel trims mostly ....if you're running dicky MPG figures it could well be the front one is shot.
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Old 01-11-2006, 09:31 PM   #10
fukamoto
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Just wait till your next CEL and get the code diagnosed. Simple as that.
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Old 01-11-2006, 10:06 PM   #11
patr
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the rear 02 is virtually meaning less in tems of the running of the car (it is barely used for any trims) so get a flash, or do the resistor fix, or else buy a new one (and you might get the code anyways). If you have a stock exhaust, and the code, its more than likely an exhaust leak or bad cat, than a bad sensor (the CEL is doing its job)
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