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    tricia18's Avatar
    tricia18 Posts: 1, Reputation: 1
    New Member
     
    #1

    Oct 24, 2011, 10:55 AM
    P0401 and p0402 on my xplorer 02. Change mg egr valve and sensor but still the check
    Engine light still on. What else should I do. Clean the hoses too
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
     
    #2

    Oct 24, 2011, 11:13 AM
    The DTC will not clear on it's own. Sometimes it will take many, many start-ups to clear the code without a proper scan tool.
    You could also have a faulty PCM.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
     
    #3

    Oct 24, 2011, 11:13 AM
    Replace the DPFE (Differential Pressure Feedback EGR) Sensor. I recommend that you go with a BWD sensor, with a Lifetime Warranty, from Advance Auto Parts. It’s also called an EGR Pressure Feedback Sensor. Afterwards, use a code reader to reset the PCM.
    RickMN's Avatar
    RickMN Posts: 244, Reputation: 52
    Full Member
     
    #4

    Oct 28, 2011, 01:56 PM
    I see many reports of problems with aftermarket DPFE sensors. Ford has updated their sensor (yet again), so I'd go with a Ford sensor.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
     
    #5

    Oct 29, 2011, 07:41 AM
    Aluminum intake manifold EGR passages tend to clog more than on composite manifolds. Thoroughly clean these passages, if the problem persists. It tends not to be a problem on composite UIMs--replacing the DPFE Sensor is usually enough.

    DPFE Sensors usually fail, due to the rubber seal, going to each tube inside the sensor, deteriorating and leaking over time. It's not long, then, until moisture interferes with the PCB and causes it to fail. I've never had a problem with BWD DPFE Sensors failing on Fords. Over the years, I've come to prefer BWD electrical components, due to form, fit, function, and fix. Their products are half the price of OEM, come with a lifetime warranty, and frequently incorporate engineering improvements I like. To me, they represent good value.

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