E48 Code- EGR FAULT
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HT4100 4.1, 4.5, 4.9 Discussion, E48 Code- EGR FAULT in Cadillac Engine Technical Discussion; I have a egr fault code, when i ran my diagnostic and i'm having a rattle when accelerating, could that ...
  1. #1
    JoJo_Brand_Star is offline Cadillac Owners Member
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    E48 Code- EGR FAULT

    I have a egr fault code, when i ran my diagnostic and i'm having a rattle when accelerating, could that a bad egr cause it to rattle when accelerating?

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: E48 Code- EGR FAULT

    Yes.

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    JoJo_Brand_Star is offline Cadillac Owners Member
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    Re: E48 Code- EGR FAULT

    Thanks, Ranger!
    I read some things up, so i did a little research on the symptoms from a bad egr valve and it did include that it cause a rattle at acceleration.

    Now, should i take the egr valve apart and clean? or should i just replace the whole egr valve?

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    HUF's Avatar
    HUF
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    Re: E48 Code- EGR FAULT

    What is "da rattle"? Is it from engine bay? Does it sound like more mechanical rattle? Say from loose exhaust parts or even cat converter? I will not be surprised at all if after all the playing with the EGR valve the rattle is still there. Have you cleaned well two EGR tubes inside the throttle body under the throttle plates? Looks like you started another link about the same problem. Not a good idea.

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    JoJo_Brand_Star is offline Cadillac Owners Member
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    Re: E48 Code- EGR FAULT

    it sound more like a loose rattle to me

  7. #6
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    HUF
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    Re: E48 Code- EGR FAULT

    Quote Originally Posted by JoJo_Brand_Star View Post
    it sound more like a loose rattle to me
    And how does EGR contribute to loose rattle? Have you tried to put it on a hoist and powerbrake instead of guessing? It will cost you $20 and five minutes. You have got two different and not related issues.

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