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 ...
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.. :-)
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.
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
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.