need help Check Engine light does not light up when i start car.
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, need help Check Engine light does not light up when i start car. in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; i took my car to emissions today and i could not pass emissions. I got something that said MIL - ...
  1. #1
    iHeartzYou is offline Cadillac Owners Member
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    Question need help Check Engine light does not light up when i start car.

    i took my car to emissions today and i could not pass emissions. I got something that said MIL - CMD = Fail
    I called my buddy up and he said its a check engine light issue. Well problem is my check engine light does not light up when i start the car.

    I was told by another buddy who has a 05 cts V that he had the same problem but he didnt remember how he fixed it. He said there was a procedure that he did to get the light to cycle and manually turn on. He had to open and close the door several times to get it to turn on?

    Anyone heard of this being done?

    Or i think my lightbulb for the check engine is just out. also could someone tell me MIL - CMD = Fail is pertaining too?

    Any help would be appreciated thanks.

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  3. #2
    LittleNo is offline Cadillac Owners Fanatic
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    Re: need help Check Engine light does not light up when i start car.

    I'd first start with the bulb...

  4. #3
    jran0823's Avatar
    jran0823 is offline Cadillac Owners Enthusiast
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    Can't service the bulb. GM changed that years ago to LED so it couldn't be tampered with.

  5. #4
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
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    LEDs can still go bad, not likely, but possible.
    Past Cadillac's

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    2001 Seville Touring Sedan - 2006-2011
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  6. #5
    Kingoftypos is offline Cadillac Owners Master
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    Re: need help Check Engine light does not light up when i start car.

    Quote Originally Posted by jran0823 View Post
    Can't service the bulb. GM changed that years ago to LED so it couldn't be tampered with.
    Quote Originally Posted by curtc View Post
    LEDs can still go bad, not likely, but possible.
    And LEDs can still be tampered with.

    KOT

  7. #6
    jran0823's Avatar
    jran0823 is offline Cadillac Owners Enthusiast
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    Quote Originally Posted by Kingoftypos

    And LEDs can still be tampered with.

    KOT
    Yes they can but most people don't know how. If your inclined with circuitry then it's a cake walk. I'm still debating on swapping out the awful orange with white. I liked the red my GTP had but red isn't suitable for the Caddy.

  8. #7
    iHeartzYou is offline Cadillac Owners Member
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    Re: need help Check Engine light does not light up when i start car.

    Well the airbag light on my Odometer is super super super DIM like u have to be in the garage inorder to see the light bright up when the car starts up.

  9. #8
    Kingoftypos is offline Cadillac Owners Master
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    Re: need help Check Engine light does not light up when i start car.

    Quote Originally Posted by jran0823 View Post
    Yes they can but most people don't know how. If your inclined with circuitry then it's a cake walk. I'm still debating on swapping out the awful orange with white. I liked the red my GTP had but red isn't suitable for the Caddy.
    Just swap out the cluster with an 06 or 07, they are white from the factory. And you'll lose that never correct clock and gain a temperature gauge.

    KOT

  10. #9
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
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    Quote Originally Posted by Kingoftypos

    Just swap out the cluster with an 06 or 07, they are white from the factory. And you'll lose that never correct clock and gain a temperature gauge.

    KOT
    And those snazzy chrome looking bezels
    Past Cadillac's

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    2001 Seville Touring Sedan - 2006-2011
    1995 Seville Touring Sedan - 2005-2006

  11. #10
    jran0823's Avatar
    jran0823 is offline Cadillac Owners Enthusiast
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    Kind of what I'm planning on doing, but I want to swap the LED's in climate control and DIC/radio display.

  12. #11
    LittleNo is offline Cadillac Owners Fanatic
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    Re: need help Check Engine light does not light up when i start car.

    Just for the diagnosing of the problem: With the Tech2 Scantool you can turn the Check Engine Light on and off by hand, to find what's wrong.

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