Question about 2004 Mazda 6

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/how do i replace my o2 sensor in 2004 mazda 6 v6? which sensor to buy and which one needs to me replaced. former owner installed aftermarket air intake, if that helps.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

ewashmidas
  • 362 Answers

SOURCE: Determine which O2 sensor to replace.

There are many reasons for a PO171 code, these need to be checked before replacing O2's:

  • Vehicle driven low on fuel or until it ran out of fuel
  • One or more injectors restricted or pressure regulator has failed
  • Fuel delivery system supplying too much or too little fuel during cruise or idle periods (e.g., faulty fuel pump, or dirty fuel filter)
  • Air leaks after the MAF sensor, or air leaks in the PCV system
  • Air leaks at the EGR gasket, or at the EGR valve diaphragm
  • Exhaust leaks before or near where the front HO2S is mounted
  • HO2S is contaminated, deteriorated or it has failed
  • Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
  • Base engine "mechanical" fault affecting one or more cylinders.
  • Posted on Feb 10, 2009

    STEVIE_N_24
    • 147 Answers

    SOURCE: o2 sensors on a 99 mercury cougar v6

    Should be 4. One in front of the catalytic converter and one after on both front and rear exhaust.

    Posted on Mar 30, 2009

    • 1 Answer

    SOURCE: How do you replace the head light bulb on a 2004 Mazda 6?

    it depends whether it is the o/s or n/s you either need to take the windscreen washer res out which is simply unscrew 2 bolts on top and lift it out of the way so you can gain acsess to the light unit then its pretty much plain sailing.or you need to remove the fuse box unit on the otherside

    Posted on Sep 16, 2008

    emissionwiz
    • 75197 Answers

    SOURCE: how to replace ignition coil mazda mpv 2004

    I show $47 for each coil at rockauto.com here is the part #
    STANDARD MOTOR PRODUCTS Part # UF406
    here is a picture, is this the coil?
    0d72734.jpg

    Posted on Feb 14, 2009

    • 1 Answer

    SOURCE: Cold Air Intake - Mass Air Flow Sensor Adapter

    i have a 91 mx6. the intake is all cattywompus and im just goin to take a piece of metal and tube and cut a hole in the peice of metal and weld the tube to it take my stupid box out and run that pipe staight to a coupling and then to the cone air filter. BAM!!!! problem fixed... i maight be able to fix yours too... e-mail me ajjordan64@hotmail.com. k?

    Posted on Apr 16, 2009

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    Problem with the catalyst dont pass test what can i do o how i can found a universal catalyst


    Heres the problem, these converters are not cheap but if do some research you will see that most aftermarket converter dont last long, maybe a year or two, the next thing is a bad o2 sensor can cause a false converter eff code, have some one test the o2 sensors, a matter of fact if you have close to or over 100,000 miles it would be wise to replace them, theres three or four oxygen sensor or also called air fuel sensors for the front ones, a weak or slow o2 sensor will cause the new converter to go bad. i know its not cheap but something to keep in mind. it would be bad to have a costly converter to fail, anyway what im saying is make sure to get a good converter, we at ours shop learned the hard way, install good aftermarket converter and half of them came back with check engine lights, then we replace them and 6 to 10 months later there back again, this time we went to dealer but we had to pay for that converter which was alomost double the price and were stuck with the aftermarket cats there warranty was out and they wouldnt refund just replace the one that were under warranty and that didnt help as we knew the converter werent strong enough, do your home work on this, must get a nissan or good aftermarket, if you go aftermarket call and ask them about problems with nissan aftermarket converters and what there warranty. we had a few that a company was trying to tell us the car wasnt running good and thats why the converter didnt last, funny thing the nissan only had 40,000 miles and ran like a top and the owner was 76 years old but they tryed not to cover it, good day.

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    Apr 22, 2010 | 2004 Mazda 6

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    04 mazda 6 lean condition


    sounds like you have a vacuum leak. It is sucking in extra air from somewhere. possibly the intake manifold gaskets. The extra air coming in fools the computer / o2 sensors to believe it has a lean mixture then it will try to compensate for the lean mixture and add more fuel.

    Oct 30, 2009 | 2004 Mazda 6

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    Clutch going out


    Clutch problems are common with the Mazda 6...usually a shudder starts then slippage occurs. Many owners have had theirs replaced under warranty. Recommend you get an aftermarket complete clutch kit, when you replace it...the OEM clutch is not dependable.
    Good luck...i hope this helps.

    Jul 18, 2009 | 2004 Mazda 6

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    Fault code P2096. Which Oxygen sensor is it front or rear? Where can I get one? Mazda quoted £350 plus labour. It's a 2004 RX8 231 registered in the UK.


    There are 2 O2 sensors...front is a current based WB...and the rear a more normal narrow band sensor. The rear could probably be retrofitted with a 4wire Bosch sensor...but the Mazda one isn't that out of line in price compared to generic if you figure in the wiring and pissing around

    The wideband one in the front is not likely to be available yet aftermarket...so you are likely stuck with an OEM replacement for it....

    The PCM will likely throw very specific codes for an O2 sensor failure and there are Monitoring routines that monitor the efficiency of them...so if the code isn't there...it is likely OK. O2 sensors and CAT's are very tightly controlled by emissions regulations...and the OBDII **** does a good job of monitoring that kind of stuff

    If you don't know if it's the problem...maybe borrow one from a buddies car if it the front one

    Jul 03, 2009 | 2004 Mazda RX-8

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    How to properly check fault codes on 1992 V6 4x4 P/U


    Code 25 equates to a problem with the "heated" oxygen sensor. The code is "Air-Fuel Ratio Lean", from the heated O2 sensor...This is the one with more than one wire. I'd replace it. But, you would do much better if you get a genuine Toyota part. I have observed that the "aftermarket" sensors do not develop the proper VDC (.045; for 90 seconds). New ones from the aftermarket do not fix this at times. Hope this helps, and thnaks for choosing FixYa. The graciousness of a FixYa rating for my assistance would be greatly appreciated. Thanks.

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    Your have a belt and your owners manual should tell you, on how many miles it should be replaced.

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