Question about 2004 Chevrolet TrailBlazer

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Service Engine soon light, OEM code P0410

About 3 months ago my car rev's to about 1100 rpm when I first start it, about 30 seconds later idles down to normal. This happens every time the car is started after sitting for more than an hour or so. Few days ago my Service engine soon light came on and stayed on. The car runs fine rest of the time. God a print out from AutoZone this is what it says: 1. Circuit relay defective or fuse open. 2. Check connector and wiring. 3. AIR Pump defective or hoses blocked. My problem is I have no idea where any of these are located????

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  • mycarfix Oct 22, 2008

    I will not have time to check this till the weekend. . . .will let you know. :o)

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  • Master
  • 360 Answers

What codes were there stored????? do you remeber???? autozone only gives you the basics on the codes i can get in depth on these

Posted on Oct 22, 2008

  • 3 more comments 
  • Jimmy
    Jimmy Oct 22, 2008

    also there have been issues withe the ground poitns on the engine causing malfunctions..... they are on the drivers side of the engine block i think theres 3

  • Jimmy
    Jimmy Oct 22, 2008

    the confirmed fix for this is the air pump and a possible 02 sensor......the 02 sensor pics up the air pump flow and adj the engines output

  • Jimmy
    Jimmy Oct 22, 2008

    REMOVED SECONDARY AIR VALVE THAT BOLTS TO THE HEAD BY THE EXHAUST MANIFOLD, FIND QUITE A BIT OF WATER AND A VALVE THAT IS RUSTED CLOSED!!! REPLACE VALVE, VEHICLE PASSED P0410 CODE TEST. some other info on this

  • Jimmy
    Jimmy Oct 22, 2008

    no air pump relay opperation(relay located next to air pump along LH frame rail). Found break in pink wire to relay near top of frame rail. Repaired and all good.


    1.)Vehicle came in with check engine light on. Code P0410-Secondary AIR injection system. 2.) No blown fuses. Ran AIR pump with scan tool and it worked fine. No water contamination in pump or lines. Checked shut-off valve on cylinder head. Had power and grounds but it wouldn't activate. 3.) Replaced stuck closed shut-off valve and all is well.

    more info on this code .......................................

  • Jimmy
    Jimmy Oct 23, 2008

    no prob just let me know i can get more info on this thanks for the fixya rating justuscc

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