Question about 1996 Ford Aerostar Extended

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I have to replace my 1996 ford aerostar oxygen sensor. Where is it and is it hard?

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  • Anonymous Sep 28, 2010

    If you have to ask those questions,How do you know it is bad?

  • tadpacific Sep 28, 2010

    Smog check told me that it had a bad O2 sensor. It didn't pass. The Check Engine light is also on.

  • tadpacific Sep 30, 2010

    I love the responses pczapp but you are wrong. The O2 sensor showed up as failed in both the Smog Check and the tuneup i got last month. I want to save some money by replacing the O2 sensor and recycling the computer. I heard it was easy to replace so i was wondering if i could do it myself by finding out where it was and if i needed special tools to replace it. I can give you the coded for both the DMV and the Tune up. Thanks.

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1 Answer

An O2 Sensor Code, does not mean the sensor is bad.
You failed for the check light, not the code.
The sensor could be old and worn out,when ever you get a check light,yes, you do retrieve all codes first. Then the code is used to direct you to an area or problem, within the powertrain .
O2 Codes are caused more by vacuum issues or other issues,and the code is set, as a result of trying to correct short term fuel trim,and goes out of range,setting the light/code

Posted on Sep 28, 2010

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  • tadpacific Sep 30, 2010

    Thanks for the info. My original question is Where is the O2 sensor located and is it hard to replace. The problem is the State of California will not smog it until the O2 sensor is fixed. Thanks for all the information. It helps.

  • Anonymous Sep 30, 2010

    The O2 Sensor will be either in the converter or just before it in the exhaust pipe.
    I knew your question, and I wanted you to understand that the O2 Sensor code, does not mean it is bad. Read my answer again.
    The state doesn't know what is wrong with your vehicle,again,an OBD2 code, only points to an area of emissions failure,NOT the actual thing to fix.

  • Anonymous Oct 01, 2010

    Correct me, I am not following
    You got a tune-up last month
    The O2 Sensor showed a code and possible failure,so you did not replace it,why?
    Then knowing you would fail inspection,you went anyway!
    You should be able to replace, using a 22mm or 7/8" wrench (same size),about half of all sensors, do require a special socket and there are maybe six popular ones.
    Sensor #1 will be closest to the engine and #2 at the outlet of the converter.
    If #2 goes bad,the converter may not be far behind,if it is over ten years old


    For for a little knowledge: Check lights have been on vehicles for 31 years
    OBD1-1980 thru 1996
    OBD2-1996 thru 2011
    During the last 25 years,almost all vehicles have been computer controlled,so there is no such thing as a tune-up. Everything including spark plugs is considered preventative maintainance,at least in my world,which extents some 47 years and some professional shop owner experience in the transmission business.

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crappy_focus
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SOURCE: Oxygen Sensor

I wouldn't think that it would need to be replaced unless it was causing you any problems:)

Posted on Feb 11, 2009

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NOTE: If excessive force is needed to remove heated oxygen sensor, lubricate heated oxygen sensor with Penetrating Lubricant prior to removal.

  1. Disconnect battery ground cable.
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  3. On 3.0L, 4.0L and 5.0L raise and support vehicle.
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I wouldn't think that it would need to be replaced unless it was causing you any problems:)

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