'94 N* Touring coupe with PO37 code?
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Northstar Engines and System Technical Discussion Discussion, '94 N* Touring coupe with PO37 code? in Cadillac Engine Technical Discussion; I got a "service engine soon" light with I start the engine, then dims and goes off before I drive ...
  1. #1
    kls
    kls is offline Cadillac Owners Member
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    Question '94 N* Touring coupe with PO37 code?

    I got a "service engine soon" light with I start the engine, then dims and goes off before I drive a block. So I checked for any new codes and PO37 came up as current. Does anyone know what that means? The last time I know I got the codes somehow from this site, but my brain is not working good right now, my husband just passed away on July 2. I replaced the #8 plug before this and the tip looked like it was burned off. What could have caused that, defective plug or what? Thanks ahead of time to all the guys and gals that help!!!! Kay

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    clarkz71's Avatar
    clarkz71 is offline Cadillac Owners Connoisseur
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    Re: '94 N* Touring coupe with PO37 code?

    Code P037 is for a "shorted intake air temperature sensor" or IAT for short.
    It's located in the rubber intake boot between the air filter housing and the throttle body.
    I'll try and post a pic.

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    clarkz71's Avatar
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    Re: '94 N* Touring coupe with PO37 code?

    Here it is. Very easy to change. And sorry to hear about your husband.



  5. #4
    kls
    kls is offline Cadillac Owners Member
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    Re: '94 N* Touring coupe with PO37 code?

    Thanks alot, mine is not in the same place but I think I see it. I'll try later because it's about 100 degrees outside right now. I'm going to wait for it to cool down alittle. Do you have any idea why the tip would burn off a spark plug? The plug threads were black, but dry not from oil. God Bless, Kay

  6. #5
    clarkz71's Avatar
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    Re: '94 N* Touring coupe with PO37 code?

    Your correct, 94's IAT sensor is under the intake manifold cover.

  7. #6
    Ranger's Avatar
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    Re: '94 N* Touring coupe with PO37 code?

    Kay,
    What was burned? The center (+) tip or the ground (-). How old are the plugs and what kind are they?

    My condolences on the loss of your husband.

  8. #7
    kls
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    Re: '94 N* Touring coupe with PO37 code?

    The plugs are only one month old and are AC Delco platinum and it is the tip that you set the gap was completely burned off. Thanks Ranger for the reponse. Kay

  9. #8
    Ranger's Avatar
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    Re: '94 N* Touring coupe with PO37 code?

    Are you talking about the electrode or the tiny platinum tip on the electrode? It would take a lot of heat to burn off the electrode and that would not be good. The platinum tips do sometimes come off. That is not a big deal. Any chance of posting a picture?

  10. #9
    kls
    kls is offline Cadillac Owners Member
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    Re: '94 N* Touring coupe with PO37 code?

    It's the tiny platinum tip and if they sometimes come off that's good news! thanks!!!!!!! I'm going to check all the plugs tomorrow and the sensor. If the IAT sensor is bad how does that effect how the car runs? Kay

  11. #10
    Ranger's Avatar
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    Re: '94 N* Touring coupe with PO37 code?

    Don't quote me here, but I believe the PCM will substitute a lower temperature to ensure that the engine will run, like 20 deegrees or such. It will likely run a little rich.

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