Coolant temp sensor

thiscocks · Dec 21st, 2020, 22:23

Hi, does anyone know where this is on the 09> D5 engine? Cheers

Tatsfield · Dec 22nd, 2020, 02:06

On the thermostat housing. See the diagram in the linked web page.

https://www.matthewsvolvosite.com/fo...ic.php?t=71604

It's item #6

thiscocks · Dec 22nd, 2020, 10:49

Thanks but I believe that is the single turbo D5 unit? Mine is the twin turbo with the weird thermostat housing tucked in right at the back of the engine next to the turbos. I'm presuming the sensor isnt on the stat housing (!) bloody hope not anyway. Ill have a bit more of a look in daylight when I can.

thiscocks · Dec 22nd, 2020, 10:58

Think Ive found it. Its on the front of the engine on the plastic coolant housing (parts 10 and 15):

Tatsfield · Dec 22nd, 2020, 11:50

Sorry if I misled you! The CTS is a very underestimated component. A great deal relies on its accurate provision of data and even if it doesn't fail, deterioration of the accuracy of the temperature readings can cause problems with the fuelling of the engine, a bit like running with the choke always a little out or not having enough choke when the engine's cold. I think the two principles that apply to the CTS, like the thermostat, are that it should be routinely changed and that the replacement should be of the highest quality.

Dec 21st, 2020, 22:23	#1
thiscocks Junior Member Last Online: Mar 16th, 2024 09:31 Join Date: Feb 2018 Location: Midlands	Coolant temp sensor Hi, does anyone know where this is on the 09> D5 engine? Cheers

Dec 22nd, 2020, 02:06	#2
Tatsfield Premier Member Last Online: Apr 25th, 2024 17:47 Join Date: Nov 2015 Location: Poole	On the thermostat housing. See the diagram in the linked web page. https://www.matthewsvolvosite.com/fo...ic.php?t=71604 It's item #6 __________________ 2012 XC70 SE Lux Polestar 230 bhp D5 Auto Oyster Grey

Dec 22nd, 2020, 11:50	#5
Tatsfield Premier Member Last Online: Apr 25th, 2024 17:47 Join Date: Nov 2015 Location: Poole	Sorry if I misled you! The CTS is a very underestimated component. A great deal relies on its accurate provision of data and even if it doesn't fail, deterioration of the accuracy of the temperature readings can cause problems with the fuelling of the engine, a bit like running with the choke always a little out or not having enough choke when the engine's cold. I think the two principles that apply to the CTS, like the thermostat, are that it should be routinely changed and that the replacement should be of the highest quality. __________________ 2012 XC70 SE Lux Polestar 230 bhp D5 Auto Oyster Grey

Dec 22nd, 2020, 10:49	#3
thiscocks Junior Member Last Online: Mar 16th, 2024 09:31 Join Date: Feb 2018 Location: Midlands	Thanks but I believe that is the single turbo D5 unit? Mine is the twin turbo with the weird thermostat housing tucked in right at the back of the engine next to the turbos. I'm presuming the sensor isnt on the stat housing (!) bloody hope not anyway. Ill have a bit more of a look in daylight when I can.

Dec 22nd, 2020, 10:58	#4
thiscocks Junior Member Last Online: Mar 16th, 2024 09:31 Join Date: Feb 2018 Location: Midlands	Think Ive found it. Its on the front of the engine on the plastic coolant housing (parts 10 and 15):

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