Coolant level sensor location (not on the expansion tank)

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My Name: Tony-55

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Posts: 10
Joined: Mon Apr 12, 2021 2:59 pm
Model: C3 2006-2009, Facelift model
Year: 2008 (08)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 202000
Trim Level: Exclusive Plus
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV6 16-valve diesel (92 PS)
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Hi Fellow owners.
Thanks again for the much-appreciated inputs. To answer your questions and suggestions and bring you right up to date:
1. I cannot see a sensor on the radiator head.
2. The only recent work was: The car was recently MOT’d and new rear road springs fitted. Prior to that I fitted a new battery, but that was a few months ago now. No error messages prior to this.
3. All levels were fine at the time of the warning.
4. I have attempted a BSI reset today, but unfortunately to no avail.
5. I located a green temp sensor that I have changed.
6. Not yet managed to locate a blue sensor.
7. Thank you for the car Bio notice that I have corrected.

Kind regards.
Tony
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My Name: Arfur Dent

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Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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DV6ATED4 9HX engine sensors on an RPO of 11404
Citroen C3 Engine sensors DV6ATED4 9HX
Citroen C3 Engine sensors DV6ATED4 9HX
Citroen C3 coolant temperature sensor 'A'
Citroen C3 coolant temperature sensor 'A'
Citroen_C3_9HX_temperature_sensor.jpg (20.35 KiB) Viewed 147 times

Part 8 is a fuel temperature sensor, so that's not relevant here.

Part 3 is the coolant temperature sensor shown in the Part A




The two sensors look like this:
1338.C1 sensor - coolant
1338.C1 sensor - coolant
1338C1.png (271.23 KiB) Viewed 147 times
1922.G4 fuel temperature sensor
1922.G4 fuel temperature sensor
1922G4_.jpg (34.97 KiB) Viewed 147 times


I am unable to see another temperature sensor on that engine from the diagrams.
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My Name: Arfur Dent

Guru
Posts: 3303
Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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plus 1920.PJ air temperature sensor as number 11.

1920.PJ Air temperature sensor
1920.PJ Air temperature sensor
1920PJ.jpg (16.89 KiB) Viewed 145 times
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My Name: Tony-55

Contributor
Posts: 10
Joined: Mon Apr 12, 2021 2:59 pm
Model: C3 2006-2009, Facelift model
Year: 2008 (08)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 202000
Trim Level: Exclusive Plus
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV6 16-valve diesel (92 PS)
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Great! Thanks for the diagram!
I'll check out the air temp sensor next if able to access it ok.
Regards.
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My Name: Ozvtr

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Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
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I don't have access to the DV6 circuit diagram but I do have access to the DV4.
There is no sensor in that like the one I described. There is only the coolant sensor and it's all by itself. The only other temp sensor is the fuel temp sensor (as mentioned).
I can only assume the coolant low warning goes off if the temp gets too high or the coolant temp sensor goes open circuit.
Seeing as you have replaced the temp sensor, have you inspected the connector pins in the engine ECU for corrosion?
My Name: Tony-55

Contributor
Posts: 10
Joined: Mon Apr 12, 2021 2:59 pm
Model: C3 2006-2009, Facelift model
Year: 2008 (08)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 202000
Trim Level: Exclusive Plus
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV6 16-valve diesel (92 PS)
Has thanked: 4 times
Been thanked: 5 times

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Hi Ozvtr.
No I've not checked that out yet, but another option to try. Many thanks for your continued interest and suggestion.
Regards.
My Name: Tony-55

Contributor
Posts: 10
Joined: Mon Apr 12, 2021 2:59 pm
Model: C3 2006-2009, Facelift model
Year: 2008 (08)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 202000
Trim Level: Exclusive Plus
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV6 16-valve diesel (92 PS)
Has thanked: 4 times
Been thanked: 5 times

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Hi.

This issue appears to have gone away! I started the car about three weeks back now and the issue did not appear. Neither the warning message nor flashing temp. lamp came on. Subsequently since that time it has been fine. I can only put this down to (in my mind), temporarily faulty electrical connections or software? Thanks again to those of you who gave valuable advice while the problem was ongoing. Fingers crossed! :D
Kind regards.
Tony.
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