Adblue is an absolute ballache of a system. Everyone I know with it who has kept a van long enough has experienced a failure. I’m afraid it’s very much not if, but when. I myself had a new injector after the 650 mile error countdown of death. Then a year later, I had another 650 countdown error and it turned out to be the pump. The following year an adblue heater error, which didn’t even need to be used unless far below zero temps, after being told I now needed a new tank as the heater cannot be replaced on a t6, I opted to have it mapped out.
I know some might scoff, but, if they are going to put these systems in vehicles, don’t make them so unreliable and costly to repair.
Modern diesels have been so strangled by emissions rubbish bolted on to them to comply with euro 6, that the consumer has to pay the price, not the manufacturer. I dread to think how many other adblue repairs the van already had by the first owner in 130k miles.
I can see why people go for euro5 tbh. Thankfully I never go near ULEZ areas anyway.