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2.4 p0402 EGR, replace or clean?

Discussion in 'Technical Chat' started by omegax, Nov 20, 2010.

  1. Nov 20, 2010 at 7:38 AM
    #1
    omegax

    omegax [OP] Member

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    What does everyoen recommend? Just got this 99 tacoma off of my uncle - 180k miles, check engine light with p0402 from the threads ive read it seems like the EGR is the problem, do you guys normally clean it or swap it out ?

    What other things - maitenance wise should I give a look? Oil was just swapped, and im going to be changing out the shocks
     
  2. Nov 20, 2010 at 8:30 AM
    #2
    HondaGM

    HondaGM Roll Tide

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    402 is an excessive egr flow code.i would take the valve off and look at it closely to see if the pintle is stuck up or has carbon build up under the seat.also check the VSV valve.
     
  3. Nov 21, 2010 at 7:57 PM
    #3
    omegax

    omegax [OP] Member

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    How would I go about checking the vsv valve? with a meter or is it something physical like the egr? Thanks !
     
  4. Nov 21, 2010 at 8:11 PM
    #4
    skytower

    skytower Well-Known Member

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    Vsv is a solenoid. Put vacuum to the ports and check for leaks of its seat.
    Cleaning an egr will buy you time to get a new one. It will only work if fouling was the cause of failure.
    9yo egr throwing codes? If vsv is good, replace the egr.
     
  5. Nov 22, 2010 at 6:39 AM
    #5
    omegax

    omegax [OP] Member

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    Thanks for the input ! I will verify the vsv - then replace egr - I tried cleaning the egr and it helped w/ performance for a couple startups and then today the light came back on doh ! O_O
     
  6. Jan 2, 2011 at 10:05 PM
    #6
    dustinclm

    dustinclm Well-Known Member

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    i am having the same code for the EGR excessive flow. i am looking for a way to fix this. i am not familiar with this piece but i do know where it is located. can someone tell me what to clean when i take it off or what lines to check? thanks
     
  7. Jan 3, 2011 at 8:39 AM
    #7
    omegax

    omegax [OP] Member

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    my problem ended up being the small little green sensor under the intake manifold, went to junkyard found another one and voila problem solved!
     
  8. Jan 3, 2011 at 8:56 AM
    #8
    dustinclm

    dustinclm Well-Known Member

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    where is the sensor at under the manifold? and how do i know if it was bad?
    ***i found a clip on the intake manifold that is green but i dont know how to tell if it is bad or not
     
  9. Jan 4, 2011 at 6:12 AM
    #9
    omegax

    omegax [OP] Member

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    I will try and take a picture of it later today its too dark now - but you put your meter to it and it should read like 15-25 OHMS or soemthing, mine read 0 ohms went to junkyard and some were out of range (some very low like 5 ohm and some 100 ohms)
     
  10. Jan 4, 2011 at 10:49 AM
    #10
    dustinclm

    dustinclm Well-Known Member

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    ok thanks. ill check mine
     
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