Hi all, I have a vauxhall combo life 1.5 diesel 2019 and am having trouble with the adblue system,the engine management light is on as well as the spanner light also the light for the adblue is flashing aslo with a 700 mile countdown before starting impossible. My garage have done a diagnostic check and both nox sensors are reading within normal parameters and after resetting it stays off for about a week 300 miles then comes back on, any help would be appreciated thank you