1999 Seville SLS hard start P1350/P1375
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Northstar Engines and System Technical Discussion Discussion, 1999 Seville SLS hard start P1350/P1375 in Cadillac Engine Technical Discussion; I have a 1999 Seville SLS that has been intermittently hard to start and when it is hard to start ...
  1. #1
    jdshafe is offline Cadillac Owners Member
    Automobile(s): 1999 Seville SLS
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    1999 Seville SLS hard start P1350/P1375

    I have a 1999 Seville SLS that has been intermittently hard to start and when it is hard to start it will bring up a P1350 and P1375 code. I have changed both crank position sensors and the cam position sensor. I have also changed the fuel pump and filter. We love this car, but I am beginning to fear leaving my wife alone with it. It does always start eventually , but I know the day will come that she will be calling a tow truck.

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  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 1999 Seville SLS hard start P1350/P1375

    If you look at the sticky thread just above this one you'll see a "How to pull codes" and "got codes ? Look here" thread. Open it and click on the url with OBD-II in the address. Scroll down to your P codes.

  4. #3
    jdshafe is offline Cadillac Owners Member
    Automobile(s): 1999 Seville SLS
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    Re: 1999 Seville SLS hard start P1350/P1375

    Well, we finally got that issue cleared up. We ended up finding the one of the plugs going to the crank sensor was damaged and not always making good contact. Thanks for help on this.

  5. #4
    tateos's Avatar
    tateos is offline Cadillac Owners Connoisseur
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    Re: 1999 Seville SLS hard start P1350/P1375

    Quote Originally Posted by jdshafe View Post
    Well, we finally got that issue cleared up. We ended up finding the one of the plugs going to the crank sensor was damaged and not always making good contact. Thanks for help on this.
    Thanks for the update. Supposedly, you only need 1 of the three sensors you mentioned to run the engine. How did you find the problem? Did it have to fail completely?

  6. #5
    jdshafe is offline Cadillac Owners Member
    Automobile(s): 1999 Seville SLS
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    Thread Starter

    Re: 1999 Seville SLS hard start P1350/P1375

    My son was going to an automotive technology class at our local junior college and he had it at school on the lift and was able to inspect everything good and found the problem.

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