Hi All,
I've had my Karoq for around 3 months and I've had "low coolant" warning flash up less than a month after I owned it.
I topped it up and thought no more till I had a flashing coil and a cruise control error light. I checked the coolant level (on cold) and it was well below the minimum. Topped up again but it still dropped slightly.
Booked in for diagnostics and since then had three instances of a flat battery out of the blue.
Took to dealership and they told me I hadn't tightened the cap so it's evaporated, they had pressure tested (guessing only for around 1 hour max) and all was fine but if still loosing coolant EGR diagnostics needed. And the other errors were caused by a bad battery. I didn't want to pay 280 for a genuine EFB with a 2 year warranty when halfords sell a 5 year warrantied one for 177 fitted. This has since resolved the starting issue but I am still loosing coolant. I've attached two pictures around 300 miles / 7 days apart before starting the engine too (when the engine is hot the level rises towards the middle of min and max as expected?).
Looking around there are various reasons;
EGR valve or cooler
Head Gasket cracked
Oil cooler
Water pump (car is around 82k)
I have also seen a YT video mentioning the coolant tank cap being faulty so might replace this in the short term to see if that cures the issue.
Just wondered if anyone else who had this issue have maybe had other reasons it could be. Diagnostics don't seem simple, cost effective or prompt and apart from being told to just get a new car on a pcp deal isn't really an option. But any feedback welcome