I have a 05 s type 4.2 driving down the road it goes every now and then into restricted preformace , the temp gauge drops to zero.. I clear engine code all is well. The code it throws is po116 so I bought a new coolant temp sensor.

Where is it located on the 4.2? I can find it.

Thanks

 

Should be on the underside of the coolant reservoir. Follow the wire. Be careful of the hose nipple on the topside. It breaks if you look at it wrong, just fyi.

 

LOL - that's the coolant level one. He means the ECT.

achyskic - you've lots of posts etc so about time to download the free workshop manual which says where it is and lots more.

In case it's not the sensor be worried to find the cause fast as it could be hiding an overheat! (Really.)

 

Thanks, I have checked the coolant level the engine runs good no signs of a over heat...the temp gauge is acting off.....
I have the workshop manual on my desktop but since upgrade to windows 8 it the pc is wonky.....all I have now is a ipad to use which wont download the manual.

So any hint where is might be?

Thanks

 

Don't know. I don't have your engine and don't run Windows at all. There's a PDF you can get or you could see what others did to make Windows work...

 

My pc is all messed up since windows upgrade I had the manual working now nothing runs on it...all I have is a ipad, but thank you for your time.

 

Worst case get the PDF

And contact Microsoft so they know they yet again broke things. (This is one of the reasons I dumped Windows.)

 

here it is

 

Thank you so much, so glad to see this forum still has some really good people willing to help others out when they ask...again thank you.

 

Update I went to remove old sensor and it turned maybe half a turn and popped out....it looks nothing like the new sensor it looks like its presses in instead of screws in......it goes into a plastic housing i believe is connected to the thermostat.....

Anyone have a clue? I am at my wits end...i cant get the old one back in and i dont think the new one is correct.

 

Replace the entire plastic housing. It comes with a new thermostat and a new temperature sensor. The plastic degrades after 10 years and will leak and becomes no longer serviceable. It is around $100 for the complete assembly and will greatly reduce the chance of further cooling system issues.

 

Agreed. I replaced the entire coolant outlet duct assembly exactly a year ago on my wife's 2006 XK8 with the 4.2 engine. Given the age and thousands of heat cycles on these cars, replacing the entire assembly is the only way to go....