1.4 HDI Coolant temperature gauge red light flashing

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My Name: Obedjugoo

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Posts: 4
Joined: Mon Jun 05, 2017 2:35 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 66500
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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Hi all. I just bought a 2004 C3 1.4 HDI. Last night and this morning when started, the top red light on the coolant temperature on the dash started to flash with a beeping sound. it went after 30 seconds and did it again after like 1 minute. Then, it was gone. The temperature went us as normal(3 bars) after that. I checked the coolant level, which is ok. Does anyone know what is that about? Any help much appreciated. Thanks all.



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My Name: Arfur Dent

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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
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Engine name: DV4 16-valve diesel (90 PS)
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Obedjugoo wrote:Hi all. I just bought a 2004 C3 1.4 HDI. Last night and this morning when started, the top red light on the coolant temperature on the dash started to flash with a beeping sound. it went after 30 seconds and did it again after like 1 minute. Then, it was gone. The temperature went us as normal(3 bars) after that. I checked the coolant level, which is ok. Does anyone know what is that about? Any help much appreciated. Thanks all.
Its the coolant level sensor. You checked the level and its between mini and maxi? Then the sensor could be faulty.
There is a post where the sensor was coated with oil and this stopped it working. The coolant had oil in it :shock:

Citroen C3 coolant level MIN/MAX
Citroen C3 coolant level MIN/MAX
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My Name: Obedjugoo

Member
Posts: 4
Joined: Mon Jun 05, 2017 2:35 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 66500
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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Thanks. I have to rectify. It's ths coolant LEVEL sensor not temperature sensor as I wrote before.
The coolant level was just above the min mark so I topped it up but the warning still came up. So I removed the sensor and gave it a good clean. It had a lot of limescale on it. So far no warning yet. Will see in a few days.

Citroen C3 Coolant temperature gauge red light flashing
Citroen C3 Coolant temperature gauge red light flashing
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My Name: Arfur Dent

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Posts: 3340
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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Obedjugoo wrote: I removed the sensor and gave it a good clean. It had a lot of limescale on it. So far no warning yet. Will see in a few days.
Good. Scale does indicate that incorrect coolant was used and if there is scale on the level sensor, expect scale on the water pump and in the radiator amongst other places :cry:
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My Name: Obedjugoo

Member
Posts: 4
Joined: Mon Jun 05, 2017 2:35 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 66500
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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I see... I guess I will have to do a flush. Thanks for the info
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My Name: Arfur Dent

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Posts: 3340
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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Obedjugoo wrote:I see... I guess I will have to do a flush. Thanks for the info
This would be a good idea :)

Looking at the coolant drained out can also give you an indication of the state of servicing and 'health' of the cooling system.

A flush should include something other than clean water that will dissolve any internal scale/mineral build-up, like this WinPlus BAF100 (on Amazon)
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My Name: Arfur Dent

Guru
Posts: 3340
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)
Has thanked: 271 times
Been thanked: 114 times

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Tips on refilling the C3 cooling system topic may also be useful to you :D
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My Name: Obedjugoo

Member
Posts: 4
Joined: Mon Jun 05, 2017 2:35 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 66500
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

Thanks for the tips. Regarding the sensor, after cleaning and refitting it, I still have the red light flashing but it doesn't do it everytime I start the car. So I am guessing I need to replace the sensor.
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