Coolant temperature sensor

Willow place · Nov 9th, 2017, 17:41

Today I checked the sensor, it read 2.8 ohms with a very cold engine, is this ok? Maybe I need to do the leak back test before I change the sensor ?

cheshired5 · Nov 9th, 2017, 18:39

It depends on what the ambient temperature was and the setting your multimeter was on.
2.8 ohms isn't a credible figure.

Willow place · Nov 10th, 2017, 08:54

Thanks for the reply, I used the 200 ohm setting and the temperature was around 20c, also is the fan meant to start and run for 5-7 minutes after switching off.

cheshired5 · Nov 10th, 2017, 17:33

Ok, well your fan behaviour isn't normal.
It sounds to me like the coolant sensor is defective and returning an extremely high (and inaccurate) temperature reading meaning that the fan comes on as a precaution.

Willow place · Nov 12th, 2017, 09:56

Now trying to get the sensor,only one spares shop in this small town,told me better to try Volvo! can anyone help with a part number please, I am now using fly spray for cold start !!!!!

cheshired5 · Nov 12th, 2017, 11:31

I might have one spare you can have for free if you cover postage.
What's your 17 digit chassis number?

Willow place · Nov 12th, 2017, 18:00

Once again ,thanks for the reply, Chassis number --YV1SW749942374302, couldn't P.M you as not enough posts .

cheshired5 · Nov 12th, 2017, 19:53

You need genuine part number 8653103 or quality aftermarket equivalent.
They can be cheap though as shown here so may be just as cheap to source brand new yourself?

Willow place · Nov 19th, 2017, 17:13

Well I have ordered from auto-doc but used the ES branch, what a disaster!! 13th November and STILL waiting, it appears that the Wallys here are only pass on to Germany the order ! 1-2 days delivery they state, not even in Barcelona at the moment, informed them today that I will not accept the package when it ever arrives. I will now drive 115 km to the Volvo agent and buy tomorrow, I think I should have bought a Renault !! (Urgh!)

Willow place · Nov 25th, 2017, 17:41

At last the sensor has arrived and fitted, it helped a bit, but a very long turn over before deciding to start,even when hot it is never instant,never had a common rail diesel before,never even had newer type car until now! Can anyone tell me the procedures to use to find this problem please,there are NO fault codes showing . (V70 2003 Diesel Auto )

Nov 9th, 2017, 17:41	#1
Willow place Senior Member Last Online: Jan 1st, 2023 17:41 Join Date: May 2017 Location: Los Finos Almeria	Coolant temperature sensor Today I checked the sensor, it read 2.8 ohms with a very cold engine, is this ok? Maybe I need to do the leak back test before I change the sensor ?

Nov 9th, 2017, 18:39	#2
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	It depends on what the ambient temperature was and the setting your multimeter was on. 2.8 ohms isn't a credible figure. __________________ 2002 S60 SE D5 Manual 209000 miles

Nov 10th, 2017, 17:33	#4
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	Ok, well your fan behaviour isn't normal. It sounds to me like the coolant sensor is defective and returning an extremely high (and inaccurate) temperature reading meaning that the fan comes on as a precaution. __________________ 2002 S60 SE D5 Manual 209000 miles

Nov 12th, 2017, 11:31	#6
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	I might have one spare you can have for free if you cover postage. What's your 17 digit chassis number? __________________ 2002 S60 SE D5 Manual 209000 miles

Nov 12th, 2017, 19:53	#8
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	You need genuine part number 8653103 or quality aftermarket equivalent. They can be cheap though as shown here so may be just as cheap to source brand new yourself? __________________ 2002 S60 SE D5 Manual 209000 miles

Nov 10th, 2017, 08:54	#3
Willow place Senior Member Last Online: Jan 1st, 2023 17:41 Join Date: May 2017 Location: Los Finos Almeria	Thanks for the reply, I used the 200 ohm setting and the temperature was around 20c, also is the fan meant to start and run for 5-7 minutes after switching off.

Nov 12th, 2017, 09:56	#5
Willow place Senior Member Last Online: Jan 1st, 2023 17:41 Join Date: May 2017 Location: Los Finos Almeria	Now trying to get the sensor,only one spares shop in this small town,told me better to try Volvo! can anyone help with a part number please, I am now using fly spray for cold start !!!!!

Nov 12th, 2017, 18:00	#7
Willow place Senior Member Last Online: Jan 1st, 2023 17:41 Join Date: May 2017 Location: Los Finos Almeria	Once again ,thanks for the reply, Chassis number --YV1SW749942374302, couldn't P.M you as not enough posts .

Nov 19th, 2017, 17:13	#9
Willow place Senior Member Last Online: Jan 1st, 2023 17:41 Join Date: May 2017 Location: Los Finos Almeria	Auto-doc !! Well I have ordered from auto-doc but used the ES branch, what a disaster!! 13th November and STILL waiting, it appears that the Wallys here are only pass on to Germany the order ! 1-2 days delivery they state, not even in Barcelona at the moment, informed them today that I will not accept the package when it ever arrives. I will now drive 115 km to the Volvo agent and buy tomorrow, I think I should have bought a Renault !! (Urgh!)

Nov 25th, 2017, 17:41	#10
Willow place Senior Member Last Online: Jan 1st, 2023 17:41 Join Date: May 2017 Location: Los Finos Almeria	At last the sensor has arrived and fitted, it helped a bit, but a very long turn over before deciding to start,even when hot it is never instant,never had a common rail diesel before,never even had newer type car until now! Can anyone tell me the procedures to use to find this problem please,there are NO fault codes showing . (V70 2003 Diesel Auto )

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