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Old 05-01-2002, 05:04 PM   #1
Scooby Newbie
Member#: 4908
Join Date: Mar 2001
Location: Fremont,NH,USA
2001 Impreza 2.5rs
Sedona Red Pearl

Exclamation o2 sensor questions, please respond

i have a 2001 2.5 and the ony mods i have done is the ganz flow intake and a autometer A/F meter. Now heres my problem, about a month ago my ce light came on so i made an appointment a exeter subaru they looked at it and it pulled the o2 sensor code. so they replaced it and checked every thing else and said that the car was fine. Now a month later the ce light is back on . I've done the fuel cap check and nothings wrong ther, could it be my intake causing the o2 sensor to blow or the a/f meter. I dont think it could be either of them because my ecu would learn the new air flow coming in from the intake and the a/f meter just mesures voltage. But i could be wrong , i just dont want to be a the deaalership once a month having my o2 sensor replaced. Could someone please inlighten me on what might be going on.

thank you
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Old 05-01-2002, 05:10 PM   #2
North Ursalia
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2000 2.5 RS, '14 For
92 5MT SVX


Front or rear O2 sensor? My header was cracked and the front O2 sensor was throwing a DTC (P0130) IIRC. Exeter fixed both . That O2 sensor has a 12 month/12,000 mile warranty on it too .

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Old 05-01-2002, 05:14 PM   #3
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Location: Arlington Heights, IL USA
2004 Impreza WRX STi
WR Blue Pearl


I dont think the ganzflo would do that, I had my ganzflo for more than a year and it never sent off a code, and I do too have an A/F meter and it never sent a code off, either I bet you its another 02 code, but if you didnt make a clean connection to the 02 sensor wire, on the ecu it could be making it feak out, I would check you connection, but its proably not it, dont worry, this is far as I can help without a scantool, you really dont know what the code is. try to find someone with a scan tool
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Old 05-01-2002, 05:23 PM   #4
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Chapter/Region: E. Canada
Location: Ottawa
2003 WRX Wagon


It would help a lot if you could get codes pulled. It could be two
totally unrelated things. It's hard to troubleshoot without knowing
what the actual codes are.

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Old 05-01-2002, 06:04 PM   #5
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2015 Outback - Croc
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Originally posted by North Ursalia
Front or rear O2 sensor?
Not likely the front, not many a/f gauges hook up to the front on a my00-01 RS...
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Old 05-01-2002, 07:43 PM   #6
Jon [in CT]
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02 WRX Sedan


No, I think North Ursalia was inquiring whether the original CEL code mentioned by the thread-starter was for the front A/F sensor or the rear O2 sensor.

BTW, you CAN hook up an A/F meter to the front A/F sensor. A search of the i-Club forums will show this. Of course, they never work.
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