Oil Pressure Sensor Sender Failure
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2004-2007 Cadillac CTS-V General Discussion Discussion, Oil Pressure Sensor Sender Failure in Cadillac CTS-V Series Forum - 2004 - 2007; My sensor/sender failed at about 78K miles. Have learned that this sensor/sender is an electronic bit that has had some ...
  1. #1
    Rey
    Rey is offline Cadillac Owners Fanatic
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    Oil Pressure Sensor Sender Failure

    My sensor/sender failed at about 78K miles. Have learned that this sensor/sender is an electronic bit that has had some failure problems. Perhaps the following will be helpful: In my case failure was noted when oil pressure rose and stuck at 130 psi. I verified that this was not my true oil pressure by simply turning off the motor, allowing the oil pressure to drop to zero. Then I just turned the ignition on without motor running. Oil pressure should have shown as "0", but it immediately climbed back to 100+psi. without the motor running. I was on a long trip so I continued to monitor the gauge. When I got home, I changed oil, and then the gauge read "0" for a while before returning to 130 psi once again.
    The part number for the sensor/sender is 12616646. GM sells this for about $75. GMPD price, including shipping, was a bit over $50.
    The sensor/sender is easily replaced. It is located on the horizontal surface of the "V" of the block at the rear of the intake manifold on the driver's side. R&R requires a deep-socket about 1 1/16" or so.

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    perfect's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    Excellent information, thanks for posting this Rey

    We need more helpful contributions like this on the forum!

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    tiremarx723 is offline Awaiting Email Confirmation
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    Re: Oil Pressure Sensor Sender Failure

    I also just had mine replaced at 70k. However mine was reading 0 under hard acceleration. Turns out the oil pan gasket was leaking, and oil was wicking into one of the connectors for the oil pressure sending unit. Dealer replaced the oil pan gasket, oil pressure sending unit, and the connector for the unit to cure the problem.

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    ronr's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    Mine failed around 58k miles (and is still broken) reading 129psi. Great info, this should motivate me to get on with finally replacing the thing!

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    Rich H's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    My sensor failed at 38K miles and I diagnosed it exactly as described above. I used a deep socket made specifically for oil pressure sender R&R sold by Pep Boys for about $6.

  7. #6
    heavymetals's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    I am on my third one.

    You can jump two of the pins with a 1k ohm resistor to see if the pcm is reading the input.

    Here is the removal tool.

    It is easier to get at the sensor if you remove the windshield wiper facia.

  8. #7
    rand49er's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    Thanks, Rey ... good info! Just like ronr, this may motivate me, too. I started a thread a while back on this same thing.

    http://www.cadillacforums.com/forums...g-129-psi.html

    I wonder how much more difficult it'll be with a Maggie in the way.
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels or OEM wheels w/'06-'07 Center Caps, plus a couple more. 472 RWHP/411 RWTQ (Mustang Dyno).

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    Twitch's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    Pretty sure the blower has to come off.

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    Re: Oil Pressure Sensor Sender Failure

    No it doesn't.

    Just remove the windshield wiper facia, which is no big deal.

    Then it is a straight shot at the sucker.

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    Re: Oil Pressure Sensor Sender Failure

    this started happening to my 06.The DTC read 130 upon startup, under exceleration would drop to 0 and climb back slowly... Did the checks, hit the autozone, $47 dollars later (needed the socket) and 15 minutes problem was gone. Back to reading 30 at idle... This forum rocks... Thanks guys!!!!!

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    vseries's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    Does anyone know if the oil pressure sensor acts as the oil Temperature sensor as well?

  13. #12
    heavymetals's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    It is pressure only.

    Temp sensor is at a different location.

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    vseries's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    Thanks , There seemed to be some misleading info out there on some auto parts sites, Heres what I figured out and you confirmed it as well.
    -oil pressure sending unit located on drivers side top rear of engine
    -oil temperature sending unit located on drivers side oil pan
    -oil level sensor located on passenger side oil pan

    oil pressure http://info.rockauto.com/getimage/ge...tex/1S6713.jpg
    oil level http://info.rockauto.com/getimage/ge...tex/5S8223.jpg
    Cant seem to find a pic of the temp sender
    On a side note does anyone know if they found a fix for the false high temp oil warning , Mine always seems to light as soon as I get home and pull in my driveway, Must have something to do with the incline??

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    MauiV's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    Mine failed for good a few weeks ago. Nothing will make you shit your pants like every bell and whistle on the dash going off and the nav screen screaming "Oil Pressure Zero--Stop Engine Immediately"

    Now it jut reads --- and I get a "Service Vehicle Soon" message whenever I fire up now. My warrenty has 15k and 6 monts left. Im just going to save everything up for that last big trip in.

  16. #15
    stars_fan's Avatar
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    Re: Oil Pressure Sensor Sender Failure

    Add me to the list of failures at 33k. Just flipped through and noticed it was reading 129psi

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