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Thread: stop engine, low oil pressure warning. oil full

  1. #1
    flchipper is offline Cadillac Owners Member
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    stop engine, low oil pressure warning. oil full

    what is going on?stop engine. low oil pressure warning on dash. check oil and its full. only happened twice.


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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: stop engine, low oil pressure warning. oil full

    Usually a failing oil pressure switch. It's on the oil filter adapter. Use only an A/C Delco switch.

  4. #3
    zonie77 is offline Cadillac Owners Connoisseur
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    Re: stop engine, low oil pressure warning. oil full

    Low oil pressure is not low oil in the engine. It could be worn bearings to an internal leak to a bad sensor.

    You can either check/replace the sensor or put a mechanical gauge to test it.

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: stop engine, low oil pressure warning. oil full

    Quote Originally Posted by zonie77 View Post
    Low oil pressure is not low oil in the engine. It could be worn bearings to an internal leak to a bad sensor.

    You can either check/replace the sensor or put a mechanical gauge to test it.
    I should have caught and mentioned that. Shame on me.

  6. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: stop engine, low oil pressure warning. oil full

    ????????? The oil pressure sending unit on the filter adapter "sends" the "low oil pressure" message if the PCM detects constant oil pressure readings less than 5 psi. That sending unit is known to fail on occasion. The ONLY way to accurately verify running oil pressures is with a mechanical gauge plumbed (temporarily) into the sending unit port.

    The oil level sensor in the front side of the oil pan sends the "check oil level" message. That also has failed, and the dipstick is your friend in this case.


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