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Old 08-24-2004, 06:22 PM   #1
Scooby Newbie
Member#: 42594
Join Date: Aug 2003
04 STI
black on Black wheels

Default CEL day before UTEC tune.

Need some info, so please share what you have.

Today i got a CEL while driving home from work. the code is P0134 (O2 Sensor circuit, no activity detected bank 1, sensor 1).

Im guessing that is my front o2 sensor must of went wack. Did a reset, but it came back on, so it must really be faulty.

However, my question is, i am getting my UTEC and it tuned tomorrow. Should i hold off on the tune and UTEC until i get the CEL issue resolved first? or will it not have an effect on the tune and should i proceed and then get the light fixed after?
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Old 08-24-2004, 09:25 PM   #2
Uncle Scotty
*** Banned ***
Member#: 16200
Join Date: Mar 2002
OK buy Nates beans


I'd wanna know why the damn thing is bad.....
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Old 08-24-2004, 11:04 PM   #3
Scooby Newbie
Member#: 49437
Join Date: Nov 2003
Location: Long Island, NY
04 wrb STI
PE1820 turbo [email protected]


i have a utec and my 02 sensor is shot.. been driving it for couple a months now and my car still performs the same way.. too lazy to replace it.. anyways i guess you'll be fine
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Old 08-25-2004, 09:06 AM   #4
Tuning Factory Inc.
Member#: 3600
Join Date: Jan 2001
Location: Detroit, Michigan, USA

Best to replace. If we are tuning I have extra O2 on hand for both WRX and STi as they often do go bad. If you do not you may not be able to tune open loop fueling very well.
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