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Old 11-23-2003, 02:31 PM   #1
Cujo31
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Member#: 19843
Join Date: Jun 2002
Chapter/Region: MWSOC
Location: St. Louis
Vehicle:
2000 2.5 RS Sedan
Silverthorn Mettalic

Angry need a FIFTH front O2 sensor?!? 50k miles stock.

Car: Bone stock 2000 2.5RS

This thing is now going through front O2 sensors every 10,000 miles. Granted, they are free under 1 yr replacement warranty, but WTH?!?!!

Yesterday I got the good old P0130. Its still driving okay, but I've got to get it changed out before a P0420 hits (as it did last time, and worked out in a new cat.)

Any ideas on how to stop burning out front oxygen sensors?!!?

searches come up with nothing relevant to fixing this recurring problem.
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Old 11-23-2003, 07:25 PM   #2
Tim Sanderson
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00 Impreza 2.5 RS
Blue Ridge Pearl

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Is that it, the front o2? I've got the p0420 code and I'm sick of it. My mileage is really suffering. Does changing the front o2 fix this code?

I got 2 new cats from the dealer for the same code at @ 30k and 50k miles. Now the code is up again and I'm thinking I should change the front o2.
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Old 11-23-2003, 07:33 PM   #3
Texas25RS
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Triple check for an exhaust leak.... once one of the gaskets have gone bad in the exhaust, it allows cool (or this time of the year, COLD) air to be sucked into the pipe and the cold air will trigger a CEL for bad o2 sensors and the cold air will eventually destroy the cat as well..... I am constantly dealing with exhaust leaks every time I fix one, it pops back up some where else.
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Old 11-23-2003, 08:32 PM   #4
Cujo31
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Silverthorn Mettalic

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cool... thanks for the idea. It might be the ticket, since they bolted in a new cat not more than 3 months ago... possibly a bad connection in front of the O2.


I've got a date with the dealership before Thanksgiving; hopefully I'll be able to get this exhaust fiasco tied up. I'm sure I'll have a nice, long conversation w/ the service rep on the topic.

Quote:
Is that it, the front o2? I've got the p0420 code and I'm sick of it
well, not always. It was in my case because I unfortunately drove around w/ the P0130 bad sensor, that eventually, the idle got so bad, the engine was backfiring and dying at stoplights, and I had to floor the car to get it to rev up enough to shift... lots of sputtering and backfiring w/ unburnt fuel i know hitting the cat...

about 1 week after this, the P0420 came on, went to the dealer and confirmed that the cat was ruined mostly because of that. (....Replaced Free )



This time, I'm going to make sure the o2 is replaced AGAIN & leaks are fixed before I ruin another cat

Last edited by Cujo31; 11-24-2003 at 01:55 PM.
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Old 11-24-2003, 07:13 AM   #5
Texas25RS
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The 0420 code does not mean the cat is bad... most liekly, the dealer was full of crap and took your money happily... I have had MANY 0420 codes aswell as the exhaust leaks (the most recent for well over a month) with no ill effects on the cat.

Remember, the exhaust leak doe snot have to be in front of the O2 that is having problems.... mine was at the flange between the cat and catback.

The 0420 code also does not mean a O2 has even gone bad. Some exhaust systems and headers also throw the code because of the increased flow or lower exhaust temps.
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Old 11-27-2003, 07:05 PM   #6
NicEJ25
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Dark Grey

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I was searching for the most recent OČ sensor topic, and I think this one is fresh. My car (01 RS powertrain with 25K miles) began jerking tonight. when I floor it, it's ok. while cruising, it's missing, half the time, it will die after a few second when I push the clutch. I still don't have my OBD2 plug so I can't read codes. is it a good idea to try a new sensor ?
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Old 11-27-2003, 09:48 PM   #7
YaZahX
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there should be a reflash on your car with teh o2... make sure u get it...
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Old 11-28-2003, 02:19 PM   #8
Cujo31
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anyways, since this was bumped...


Went to the dealer, ran another scan, and got a P0133. O2 slow response bank 1

went through a 3-drive cycle, CEL went off, and hasn't come back on since... hopefully it was just the change in the weather, it got really cold here fast.

Checked for exhaust leaks, and found none.

we'll see what happens... so far, still no need for a new one.
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Old 11-28-2003, 10:21 PM   #9
Dr Ken
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Before anything else,
make sure that the springy-thing that sticks out of the O2 sensor isn't rubbing against the axil of the front right wheel. You should have a little wire-hook-thing which the O2-springy-thing loops around that prevents the axil rub, that would otherwise cause a Error message. It may have buggered the sensor, but more than likely is sending a erroneous error because it's rub-rub-rubbing. Over.
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Old 01-07-2004, 07:46 PM   #10
Ahzlon
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i only seem to blow a P 130 when ever it gets REALLY cold... like 10 and below... but i can clear it and i wont get it back for like weeks
could this just be a computer being stupid??
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Old 01-09-2004, 12:53 PM   #11
Warp3
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Quote:
Originally posted by NicEJ25
I was searching for the most recent OČ sensor topic, and I think this one is fresh. My car (01 RS powertrain with 25K miles) began jerking tonight. when I floor it, it's ok. while cruising, it's missing, half the time, it will die after a few second when I push the clutch. I still don't have my OBD2 plug so I can't read codes. is it a good idea to try a new sensor ?
Hmmm...that almost sounds more like an ignition misfire than a bad O2 sensor.

I'd check the plugs/plug wires first. Try unplugging each plug wire from the coil pack (on top of the intake manifold) and see if any of the connections are starting to corrode; if one is corroding, then that plug wire might be bad.

Shane -- http://www.warpthree.com
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Old 01-09-2004, 02:13 PM   #12
codger
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Also try reseating the connection to the pigtail harness plug in. Give both male and female parts of the connection a quick spray of electronic cleaner before plugging back in. I got all sorts of spurious front O2 codes until I did this.
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Old 01-09-2004, 03:15 PM   #13
Opie
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'14 XV Crosstrek Ltd

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Has your car ever gotten the ECU reflash? Subaru released an ECU reflash for the 2000 & 2001 2.5RS's about 2 years ago to help with random O2 codes. Certain 2000 RS's (such as mine) wern't listed in the reflash list, but if you have a good dealer (like I do) they will probably do the reflash for you. It has cured all of my CEL's.
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