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Old 09-13-2003, 05:18 AM   #1
STI808
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Member#: 39060
Join Date: Jun 2003
Location: Honolulu, Hawaii
Vehicle:
2004 STI
Java Black

Default How do I turn off check engine light

Just wondering if anyone know how can I turn off the check engine light for the 3rd cat O2 sensor. I did not install my downpipe yet but I want to do everything at the same time.
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Old 09-13-2003, 07:02 AM   #2
bert_WRX
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Join Date: Oct 2002
Location: Anchorage, AK/Burbank, CA
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hey 808 when i put my txs turbo back on i didnt get CEL at all...what are you putting on? are you going to the install day on sunday to put it on?

-gilbert
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Old 09-13-2003, 07:13 AM   #3
Paul Sakai
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Location: Seattle
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2000 RS Coupe
Silverthorne

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Reset the ECU
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Old 09-13-2003, 06:35 PM   #4
davidm_sh
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Join Date: Apr 2001
Location: Fort Collins, CO
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2004 Impreza WRX STi
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Currently it sounds like most OBDII scanners don't work on the new STi. I had one that worked on my 02 WRX and it does not communicate with my 04 STi . Your only other option is to disconnect the battery for a few seconds, but the downside to this for me anyways is I have to reprogram my stereo.

I am going to wait for ECUTek and Cobb to release their reflashes before modifying this car. Exhaust wise you WILL get Cat inefficiency errors if you goto any aftermarket exhaust just like people did with the WRX. The reason some people don't get the CEL as often as others is driving habits. If you do steady state cruising between speeds of ~45mph to 70mph the ECU checks and will throw a code. Someone who rarely drives long distances/interstate and mostly in town will probably never experience a CEL from having no cats or fewer/hi-flow cats.

EDIT: Winter is coming and along with that the nice cold air = more power . Just give the tuners some time to work on the ECU reflashes over the winter and hopefully they will have them ready by summer. That is my thought process anyway [shrug].
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Old 09-13-2003, 09:53 PM   #5
CreoWRX
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Location: West L.A.
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2014 Audi S6 + APR
Glacier White

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I recently purchased an Innova 3100 OBD-II code reader that works perfectly fine on my 2004 STi.

-Mike-
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Old 09-13-2003, 09:59 PM   #6
dsmperformance
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Member#: 15059
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Latrobe, PA
Vehicle:
2004 WRX STi
1991 TSi

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Quote:
Originally posted by CreoWRX
I recently purchased an Innova 3100 OBD-II code reader that works perfectly fine on my 2004 STi.

-Mike-
I got the same tool, works on my STi too. I purchased it from PartsAmerica for $129...

Equus 3100 OBDII Scan tool
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Old 09-13-2003, 10:38 PM   #7
STI808
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Java Black

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I probably won't be there on install day because I have to stay home help my sister watch her kid
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Old 09-14-2003, 01:24 AM   #8
qcslvr30
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Join Date: Aug 2003
Location: Portland, OR
Vehicle:
2006 WRX STI
aspen white

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Perrin now offers an O2 simulater that works on the 04's. Its just a little black box wired in line with the sensor wires. Easiest place to mount is under the intercooler just before the sensor plugs into the car. I've been CEL free now for about 800 miles.

James
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Old 09-14-2003, 01:59 AM   #9
03UURX
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05 Legacy GT

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Im testing one right now for the STi . I have it on my car and no cells as of about 100 miles,but its early still. Simple to install . Im running catless Turbo XS.

Kenny
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