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Thread: 2001 Mitsubishi Eclipse GT - P0403 error code

  1. #1
    Dave White
    Guest Dave White's Avatar

    Default 2001 Mitsubishi Eclipse GT - P0403 error code

    My check engine light came on yesterday, and scanning the codes, I get a
    "P0403 EGR Flow Circuit Malfunction". Last week I changed the air filter
    and PCV valve - the light came on three days later, so I don't know if these
    are related at all. Anybody know what I can check?

    Thanks for any info,

    Dave White

  2. #2
    Outlander
    Guest Outlander's Avatar

    Default 2001 Mitsubishi Eclipse GT - P0403 error code

    If you used an aftermarket PCV I would be suspicious. In my limited
    experience they tend to be leakers. I would soak the original one
    (hopefully OEM) in some solvent blow it out with air and reinstall. Who
    knows?

    Dave White wrote:
    > My check engine light came on yesterday, and scanning the codes, I get a
    > "P0403 EGR Flow Circuit Malfunction". Last week I changed the air filter
    > and PCV valve - the light came on three days later, so I don't know if these
    > are related at all. Anybody know what I can check?
    >
    > Thanks for any info,
    >
    > Dave White

  3. #3
    Dave White
    Guest Dave White's Avatar

    Default 2001 Mitsubishi Eclipse GT - P0403 error code

    "Outlander" <cdugan@mail.cosmosbbs.com> wrote in message
    news:1119899357.292076.147730@f14g2000cwb......... o...........
    > If you used an aftermarket PCV I would be suspicious. In my limited
    > experience they tend to be leakers. I would soak the original one
    > (hopefully OEM) in some solvent blow it out with air and reinstall. Who
    > knows?
    >


    Ah, too late. I changed it Wednesday, and the trash came Thursday.

  4. #4
    Nobody U. Know
    Guest Nobody U. Know's Avatar

    Default 2001 Mitsubishi Eclipse GT - P0403 error code

    The PCV valve isn't connected to the EGR in any way. It doesn't need
    changing ever, really. It is a check ball inside a housing. Blow and suck on
    it for the click sound and you know it's ok. If not, clean it out with brake
    parts cleaner. That's all it takes. Its really a big scam at oil change
    places.

    Now, you changed that and the filter, well guess what? There are hoses off
    the intake that feed into the EGR. Check that.
    --
    Todd Honea

    "Dave White" <info@spectrachrom.com> wrote in message
    news:HumdnZSYfJJh_SLfRVn-1A@...............
    > My check engine light came on yesterday, and scanning the codes, I get a
    > "P0403 EGR Flow Circuit Malfunction". Last week I changed the air filter
    > and PCV valve - the light came on three days later, so I don't know if

    these
    > are related at all. Anybody know what I can check?
    >
    > Thanks for any info,
    >
    > Dave White
    >
    >

  5. #5
    Outlander
    Guest Outlander's Avatar

    Default 2001 Mitsubishi Eclipse GT - P0403 error code

    If that Eclipse is mid 90's with the vacuum actuated EGR any vacuum
    malfunction or leak will affect the EGR performance to some degree.

  6. #6
    Dave White
    Guest Dave White's Avatar

    Default 2001 Mitsubishi Eclipse GT - P0403 error code

    "Dave White" <info@spectrachrom.com> wrote in message
    news:guudne06haLNB1rfRVn-qA@...............
    > "Outlander" <cdugan@mail.cosmosbbs.com> wrote in message
    > news:1120181518.890897.301560@g43g2000cwa......... o...........
    > > If that Eclipse is mid 90's with the vacuum actuated EGR any vacuum
    > > malfunction or leak will affect the EGR performance to some degree.
    > >

    >
    > No it's a 2001. I checked all the hoses - everything looks fine. I

    cleared
    > the code Thursday, but today the light came back (actually two readings of
    > the same code), so it wasn't some random reading. I'm going to dig a bit
    > further tomorrow.
    >


    OK, solved it. I replaced the replacement PCV valve (which was a cheapo
    model from AutoZone), with another make. This time, when I installed it I
    put a small metal hose clamp on the vacuum hose. The car's running much
    better now, and I've had no more error codes. Whether it was a faulty
    valve, or a bad hose seal, I don't know (I'm hedging towards the latter),
    but as the car's running fine now, and it cost under ten bucks, I'm not
    going to worry about it.

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