Hi everyone, im new to the site, and i have an issue with my Vauxhall insignia 2.0 sri vx line 2014, Im loosing engine coolant, but its not going into my engine, i have done a head gasket test and it stays blue, i had it in a garage to do pressure test, and everything is fine, but when i drive it comes up on screen, saying ''engine coolant low'' but when i check my coolant levels, its empty...... can anyone share any advice on what this could be

 

thank you in advance

Is it steaming up inside the vehicle? - if so then heater matrix may be the cause

If its not being burnt through the exhaust (white smoke) then maybe its leaking into the engine oil - oil will appear milky in colour

Also, check the coolant pressure cap is okay or renew as this can lower the pressure in the system leading to a lower boiling point and losing it through steam from the expansion tank