coolant temp sensor location, 05 V
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2004-2007 Cadillac CTS-V General Discussion Discussion, coolant temp sensor location, 05 V in Cadillac CTS-V Series Forum - 2004 - 2007; I reasearched a while and couldn't find what I was looking for, so my apologies if I over post this....05 ...
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    Wingsfan4life's Avatar
    Wingsfan4life is offline Cadillac Owners Fanatic
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    coolant temp sensor location, 05 V

    I reasearched a while and couldn't find what I was looking for, so my apologies if I over post this....05 V...car runs fine, but intermittently, digital and analog guage reads over heat, along with infotainment readings of; "idle engine" and "overheat shut off engine" no engine code besides "lean bank one".....1st guess, temp sensor..need location on it for self service...all feedback greatly appreciated.. :-)

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    darkman's Avatar
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    Re: coolant temp sensor location, 05 V

    The water temperature sensor screws into the driver's side head close to the front where the intake tube resides.

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    FuzzyLogic is offline Banned
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    Re: coolant temp sensor location, 05 V

    See that brass thing that's not totally screwed in below the #1 cylinder (the one with the aftermarket springs)?

    If you're looking to replace it, it's about $22 at Autozone and you'll need a 3/4" wrench to remove it.


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    Wingsfan4life's Avatar
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    Yea wasn't too bad, removed intake box and bam....drove after replacing and temp shot to 280 and I cut engine off..waited a bit and hvnt had a problem since..weird eh?

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    FuzzyLogic is offline Banned
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    Re: coolant temp sensor location, 05 V

    By "intake box," you mean your cold air intake?

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    Wingsfan4life's Avatar
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    Lol...no CAI, too loud...maybe next year when she's forced fed....factory airbox...lol

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    darkman's Avatar
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    Re: coolant temp sensor location, 05 V

    Quote Originally Posted by Wingsfan4life View Post
    Yea wasn't too bad, removed intake box and bam....drove after replacing and temp shot to 280 and I cut engine off..waited a bit and hvnt had a problem since..weird eh?
    I would refresh the grounds located under the hood. This includes the main battery ground, the 3 grounds located on the back of the cylinder heads and one located underneath the hood support rod. These grounds become oxidized and should be hit with some sandpaper, small file, or other abrasive. Star washers can also help. The computer uses these circuits for reference voltages such that grounds not directly related to one circuit can cause issues (such as a gauge malfunction) with another circuit.

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    Wingsfan4life's Avatar
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    Interesting....I'll have to do that tomorrow if it acts up..lol

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    Darkman, looks like I'm gonna need to do this today...driving home yesterday analog and digital gauge went haywire...car seemed fine so I drove it home...no steam and when guages were normal temp was normal

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    waddsn1060 is offline Cadillac Owners Member
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    How did you get a 3/4" around it? Even with the intake box off, I can't get around it because of a plate that sticks out to the right of it.

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    darkman's Avatar
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    Re: coolant temp sensor location, 05 V

    Unfettered access to the temperature sensor would require removal of the exhaust manifold which in turn would require loosening the cat back system and dropping one catalytic converter. That should not be necessary however since the temperature sensor uses pipe thread and should only be tightened to 15 foot pounds (with Teflon tape). You just need to get some 3/4" tool (wrench, pliers, channel locks, vise grip, etc) on it enough to get it turning.

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