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O2 Sensor for 2002 lancer

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Old Mar 22, 2013, 07:35 PM
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O2 Sensor for 2002 lancer
Can you recommend a good aftermarket oxygen sensor for 02 lancer?
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Old Mar 23, 2013, 03:49 PM
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Bosch
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Old Apr 17, 2013, 10:02 PM
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i got the denzo and i think it was fine
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Old Apr 18, 2013, 06:21 AM
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I agree with green bandit, go with bosch. A few yrs back I would of said a different company for the downstream one. back then it was $300. But they are around $90 for downstream now and $60 for the upstream. Make sure to get exact fit and not universal
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Old May 2, 2013, 08:52 PM
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This will get rid of the P0421 code that is flipping?
Trying to pass smog and the code keeps turning on, I switched the front o2 but it still getting a check engine light. Getting the second o2 tomorrow and replacing that.
Hopefully that fixes it. Any other ideas if that doesnt work? Everything is stock.
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Old May 2, 2013, 10:34 PM
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There is a recall for the warm up catalyst. call your dealer and see about getting it reprogrammed
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Old May 5, 2013, 10:53 AM
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it is a wrong code the ECU, I am with the same problem, but with a new ROM will be solved,
by the way if anyone has a ROM for lancer OZ 2003 and it doesn't have the code error it will be great for me!
Last edited by luis argu; May 5, 2013 at 01:11 PM.
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Old May 6, 2013, 01:23 AM
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I called the dealership and they said there were no open recalls for my car.
I was running a testpipe for 2 years so Im going to bet the rear o2 is shot.
Replacing that today. Hopefully it fixes it.
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Old May 6, 2013, 06:03 AM
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ok luck Man
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Old May 7, 2013, 05:16 AM
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Denso O2 Sensor
I just got a Denso O2 Sensor (upstream) at Advance Auto Parts through online purchase. I got the direct fit for $64.99, less $20 for the online code discount plus $10 mail-in rebate. The total cost $38.92 after mail in rebate.
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Old May 7, 2013, 07:08 AM
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Originally Posted by Sairo
I just got a Denso O2 Sensor (upstream) at Advance Auto Parts through online purchase. I got the direct fit for $64.99, less $20 for the online code discount plus $10 mail-in rebate. The total cost $38.92 after mail in rebate.
^ this
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Old May 14, 2013, 04:48 PM
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I got the o2... put it in and its still throwing the code...
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Old May 14, 2013, 05:06 PM
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Which o2 sensor? there are two.
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Old May 15, 2013, 04:10 AM
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Originally Posted by eusgen
Which o2 sensor? there are two.
I replaced both. Front and Rear
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Old May 15, 2013, 06:23 AM
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Originally Posted by luis argu
it is a wrong code the ECU, I am with the same problem, but with a new ROM will be solved,
by the way if anyone has a ROM for lancer OZ 2003 and it doesn't have the code error it will be great for me!
How do you flash the ROM to the ECU? What equipment do you use?
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