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Cayenne P0117 Coolant Temp. Sensor Help

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My wife's 2004 Cayenne V6 had CEL recently and the fans sound like it is a jet engine. Put a diagnostic tool and got the P0117 code, which should be low voltage on the Coolant Temperature Sensor. If I clear the code, it runs OK for a bit, then comes back on and runs rough at start and the fans come on high.

So I think I know that I need to change the CTS, and I found it (I think) from another post (what a terrible location!)...I found the part at a Porsche dealer online and it is on its way.

My Question is: Does anyone have any diagram, shop manual info, tips, or instructions to help me remove and replace? Since it is so hard to reach and see, any help would be great.

Thanks in advance if anyone can help! :thankyou:

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Do you have any leaks - like the coolant tubes on top of he engine?

Hi Loren,

I did lay under the vehicle last night and looked up through the plastic covers. There is a hose about 1" that is very near the CTS and where the clamp attaches it to the water neck, it looks like a little orange

corrosion (like perhaps a leak?). There is never any noticeable coolant in the garage, or from what I can see, nothing on the engine??

I can try to get a photo if that will help you.



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Loren... I think only the V8 had a problem with the coolant pipes. There are no pipes like that on the V6 that I know of. There is an updated part for the coolant temp sensor and be sure to replace the plastic retaining clip for the sensor as they often break when being removed.

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Thanks for the info and advice. I have the part ordered, but since it seems like a pain to reach, and there may be other issues, I may just break down and drive the hour to the Porsche dealership. I also need them to fix the air bag fault anyway....That light is on as well. A shame to have these problems when it only has about 26,000 miles <_<

I guess I will see how lucky I am feeling when the part comes in.

Thanks again guys.

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