Low coolant level warning
2011 Vauxhall Insignia DM11

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James
Driver
1 points

Problem added: May 15, 2021 (4 months ago)
Just got new timing belt and water pump fitted to my Vauxhall Insigna Exclusive158CDTI .
When driving home from garage I got a warning - coolant level low -top up. On inspection of the expansion tank I could barely see a drop in the recommended coolant level. It is only three days since the timing belt/water pump was fitted and now every time I take a drive the coolant warning appears - what could cause this to happen
Car: Vauxhall Insignia
Variant: DM11
Model Year: 2011
Category: Leaks & Noises
Replies and Fixes
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whittingehame
Legend
21,075 points

May 15, 2021 (4 months ago)
If it's not losing coolant , may be faulty sensor . Could check coolant level first thing in morning when cold before starting the car and top up if needed and see how it goes .
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James
Driver
1 points

May 16, 2021 (4 months ago)
Thanks whittingehame,
Checked as you suggested and noted slight coolant lost. About 3ml coolant needed to Top up. Will be taking a short run this afternoon and will let you know how it goes !
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James
Driver
1 points

May 16, 2021 (4 months ago)
Took car for run .Low coolant warning appeared again after travelling 4 miles.
Temp gauge showed normal. Could not find any signs of leak.
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whittingehame
Legend
21,075 points

May 16, 2021 (4 months ago)
Take it back to garage for checking . They can pressure test the cooling system if needed and that should show any leak
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James
Driver
1 points

May 16, 2021 (4 months ago)
Many thanks for your help. Will do that tomorrow.
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whittingehame
Legend
21,075 points

May 16, 2021 (4 months ago)
Be grateful if you could update the forum on the outcome .
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Matthew
Driver
4 points

Jun 19, 2021 (3 months ago)
We seem to be having same problem at minute our water pump was leaking had new one fitted no leaks now. However after driving half hour or so code 3 comes back on again. The coolant isn't returning to the expansion tank. It is really wierd.
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