Damn! High Oil Temp and alarms? Here is a fix for it (page 7 post #98). - Page 16
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2004-2007 Cadillac CTS-V General Discussion Discussion, Damn! High Oil Temp and alarms? Here is a fix for it (page 7 post #98). in Cadillac CTS-V Series Forum - 2004 - 2007; Try this: With the oil temp reading "high" turn on everything, A/C and lights. Watching the oil temp, turn off ...
  1. #226
    heavymetals's Avatar
    heavymetals is offline Cadillac Owners Master
    Automobile(s): 05 maggied CTS-V, 03 maggied Z06
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    Re: Damn! High Oil Temp and alarms? Here is a fix for it (page 7 post #98).

    Try this:

    With the oil temp reading "high" turn on everything, A/C and lights.

    Watching the oil temp, turn off the A/C and lights.

    Does the temp drop?

    If it drops as soon as you turn the stuff off, it is a bad ground.

    That could be a bad ground at the sensor end.

    The temp sensor is part of the oil level switch on the pan.

    Since you said everything worked till it got wet, the sensor connector may be funky as that is the only one under the car (for this circuit I believe).

  2. #227
    Pillow is online now Cadillac Owners Fanatic
    Automobile(s): 2010 Escalade ESV & 2005 CTS-V
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    Re: Damn! High Oil Temp and alarms? Here is a fix for it (page 7 post #98).

    My oil temp gauge is starting to flake out as well. Tested with the dash dimmer switch last night. As the dash lights go from brighter to darker the oil temp fluctuates drastically. Simple test that works!

    I will probably perform the Big 3 at the same time as some people seem to have done. Just 4 gauge wire, I'm not going full bore with 0 at this time.

    FWIW ALL ALL my GM vehicles over the years suffered from cruddy grounds. They just need cleaned yearly and occasionally the main grounding wire replaced. I think with todays sensitive electronics they are more susceptible to ground resistance issues.

    Great thread!

  3. #228
    Pillow is online now Cadillac Owners Fanatic
    Automobile(s): 2010 Escalade ESV & 2005 CTS-V
    Join Date
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    Location
    Warrenton, VA
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    40
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    Re: Damn! High Oil Temp and alarms? Here is a fix for it (page 7 post #98).

    Ok, update. I only cleaned the hood strut mount grounding location and the problem is solved.

    Cleaned the contact surfaces thoroughly and then applied some di-electric grease and bolted the strap back down. 5-10 min job.

    Big thank you to this thread's contributors!!!

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