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Old 01-05-2005, 12:48 PM   #1
MidNite Runner
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Default O2 Sensor Help

I have a 2002 impreza RS and my check engine light came on a few days ago and has been going on and off over the weekend, I finally made it into the dealership to find out what was wrong with it and they said i needed a new O2 sensor in the cat. and it would cost $250 for them to replace. over the weekend my windsheild broke so i am tight on money. I was trying to locate a new sensor and i am not sure if i need the one before the cat or after. the sheet subaru gave me says 101 test, needs O2 sensor. can anybody help me with what sensor i need, i found a rear sensor at Napa for $109 and the front for $80. Or can i just buy something to remove the sensor, might be easier for future exhuast mods.
thanks for any help
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Old 01-05-2005, 01:10 PM   #2
2.5suburaRS
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I feel you man. I have a bad O2 sensor myself but just keep on resetting the code when the engine light comes on. been saving me money. little harder on gas but it is all good
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Old 01-05-2005, 01:45 PM   #3
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Do you know what was the code?

Front is P0130 and rear is P0136...

It's actually an easy fix for the DYI.... as both are pretty accessible....

Robin
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Old 01-05-2005, 01:56 PM   #4
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22mm wrench
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Old 01-05-2005, 02:17 PM   #5
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it is probably the front sensor... VERY easy to replace.

i made the mistake of having the dealership fix it the first time it blew. 250 later blah blah blah

so the next time it blew i just purchased the sensor and did it myself. Very simple. Even easier if you can get access to the tool. It is an attachment to a ratched that has a cut out in it for the wire. The installation is quite idiot proof. you just need to get under the car! My buddy works at a garage and his boss let me use his lift and tools for 10 bucks! took me 10 minutes to install the sensor. 78 bucks for the front 02 sensor (parts guy gave me a discount). MUCH better than getting jacked by the dealership. I was in shock and kicking myself when i realized how easy it was.
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Old 01-05-2005, 04:26 PM   #6
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They didn't give me the code, they just said it was in the catalytic converter i figured it was on the invoice but its not, is there any way i can check to see what one is bad or do i have to have the code read again?
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Old 01-05-2005, 05:14 PM   #7
jasona
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If it's the rear I think I've got one I could sell you for like $80.
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Old 01-06-2005, 01:52 AM   #8
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I have the same car as you, and I have had a Cat inefficenty (PO420) code ever since I changed my exhaust. This affects the sensor after you cat. Assuming the car is running fine, this likely what the Dealership is talking about.

Don't worry about it, unless you have Cali style emmissions testing in your area. This will not damage your car.

You say on and off. Do you mean flashing?

Also look in to generic three wire o2 sensors. There is something posted about us sharing a Mustage GT sensor.

Shawnrs
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Old 01-06-2005, 10:16 AM   #9
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A bad O2 sensor will give you horrible gas milage, which in turn will destroy your cat. Chances are its the front sensor, since the rear is just there to confirm the front.
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Old 01-06-2005, 02:05 PM   #10
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IF the dealership is saying the cat is bad that means their are going off of what the rear O2 sensor is saying because that is all the rear does since its directly behind the cat. You can either buy a CEL fix (rallitke.com) or just say forget it. Your gas mileage will not change. I dont even have my rear O2 sensor even hook up.
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Old 01-06-2005, 02:31 PM   #11
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According to a friend of mine who works at AutoZone, they charge approximately $30 extra for an O2 sensor with the appropriate connector for your car. They have sensors available with just bare wires on them. If you're comfortable soldering the old connector onto the new sensor, I'd go that route. Just make sure that you get the right flavor of sensor; there's narrowband and wideband sensors. I'm under the impression that RS's have narrowband sensors, but I'll leave the definitive answer up to someone who actually has one.
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Old 01-06-2005, 08:15 PM   #12
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My MY00 RS has a wideband front O2 sensor, all five wires worth.
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Old 01-07-2005, 03:57 PM   #13
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I rechecked what sensor it was and it is the front sensor that went bad, i got a new one from the dealership for $90 and now i just have to install it. Thanks for all your help. After I install it will the cel turn off by itself, or will I have to reset the ECU?
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Old 01-07-2005, 04:47 PM   #14
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You'll have to reset it....
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Old 01-07-2005, 06:39 PM   #15
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How many miles do you have?
Shouldn't you be getting it replaced for free under the 8yr/80k deal?


I assume they don't have the same recall that applied to the GC6's and stuff...? I've gotten 2 new sensors, a new catalytic converter, and a reflash all free over the past 2 years; all from o2 sensor CEL's
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Old 01-07-2005, 10:32 PM   #16
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im out of warranty it was 3 year 36000 miles, and i have over 40,000 now
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Old 01-08-2005, 12:57 AM   #17
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Quote:
Originally Posted by MidNite Runner
im out of warranty it was 3 year 36000 miles, and i have over 40,000 now
Don't think so. You should have an 8-year/80K Emissions Warranty with which the O2 sensor should be covered under.
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Old 01-08-2005, 01:16 AM   #18
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Thats weird, when my front O2 (air/fuel) failed the car was nearly impossible to drive.

Did you ever find you what the code was?

Good luck

ShawnRS
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Old 01-08-2005, 11:11 AM   #19
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I will have to check with the warranty information but the dealer told me it would cost me $240 to fix, the codes that it is reading was PO171 and PO130. I went to PepBoys and purchased a code reader for $80 so I wouldn't have to go through the dealer for any other CEL and so I could clear it when I can get a chance to fix it.
The car runs fine, it seems to idle a little rough but nothing to bad
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Old 01-08-2005, 11:16 AM   #20
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The only thing i saw for the warranty was the normal 36000 mile coverage and

Powertrain Limited Warranty
Powertrain coverage for all models is five years or 60,000 miles, whichever comes first. It covers the major powertrain components listed below:*

Engine block and all internal parts
Cylinder heads and valve train
Oil pump, oil pan
Timing belts or gears and covers
Water pump
Flywheel
Intake manifolds
Oil seals and gaskets
Turbocharger Assembly
Transaxle case and internal parts
Transaxle seals and gaskets
Axle shafts and constant velocity joints (except boots)**

Torque converter
Electronic transmission control unit
Propeller shaft
Wheel bearings

and i don't think emissions is covered under the powertrain warranty
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Old 01-09-2005, 08:01 PM   #21
Cujo31
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What they are talking about is the 8 year or 80,000 mile warranty that is automatically applied to any car. This applies to your car still
Anything on the emissions system fails in that time period, Subaru pays for it
I hope the dealer your are going to is a good one. If not, find one where you can take a moment and talk to the service manager. The may need to re-calibrate ("re-flash") your ECU as well.

Mentioning Parts Recall #WXW80 will always get their attention when it comes to oxygen sensors and P0130, P0133, P0135, and P0420 CEL codes.

I've had 4 02 sensors replaced all FREE for just this reason.

Anyone else think this would work or is it only for 93-01's ??????????


*edit* I predict for now, your car will run fine for maybe a month or so, but slowly, it will start to idle worse and worse and then it will get to the point where it dies at stoplights and what not. That's pretty much what mine did.

Last edited by Cujo31; 01-09-2005 at 08:07 PM.
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Old 01-09-2005, 08:07 PM   #22
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Quote:
Originally Posted by Cujo31
What they are talking about is the 8 year or 80,000 mile warranty that is automatically applied to any car. This applies to your car still
Anything on the emissions system fails in that time period, Subaru pays for it
I hope the dealer your are going to is a good one. If not, find one where you can take a moment and talk to the service manager.

Mentioning Parts Recall #WXW80 will always get their attention when it comes to oxygen sensors and P0130, P0133, P0135, and P0420 CEL codes.

I've had 4 02 sensors replaced all FREE for just this reason.

Anyone else think this would work or is it only for 93-01's ??????????


*edit* I predict for now, your car will run fine for maybe a month or so, but slowly, it will start to idle worse and worse and then it will get to the point where it dies at stoplights and what not. That's pretty much what mine did.
What this guy said. I should have been more specific.
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Old 04-10-2005, 11:30 PM   #23
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Any clue if the 8 yr 80,000 is transferrable? I just bought an '02 RS from the first owner, but didn't do any paperwork on warranty transfer. It's got 33k miles. I just got the P0130 code too, and that would be great if I could get the dealer to replace the o2 sensor for free.
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Old 04-10-2005, 11:59 PM   #24
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I just got a CEL on my car and have yet to get it read(this weekend) but i only have an intake and headers for performance so im guessing its from the headers

if it doesnt go away on its own somehow is there some way i can rig it so the light doesnt go on? i searched ralliteks site and found nothing

oh and does this hurt my car at all?
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Old 04-11-2005, 12:14 AM   #25
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Quote:
Originally Posted by buzzard
Any clue if the 8 yr 80,000 is transferrable? I just bought an '02 RS from the first owner, but didn't do any paperwork on warranty transfer. It's got 33k miles. I just got the P0130 code too, and that would be great if I could get the dealer to replace the o2 sensor for free.
Yes, it should be. Just talk to the dealership. They should fix it for free.
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