Kangoo Qualmte & starts now not more

hello , yesterday after highway ride (half hour) the Kangoo smoked at the first start(at the traffic lights) huge (output) and lost power , then drove back normally to the next stop and that repeated itself so 6 times to the parking lot , today he does not jump any more at all , oil level is ok , no leaks , diesel is inside the diagnosis of the Avd man : it could be a glowing candle broken , error code P0409 , since the Avd-mann nix could start with the code hab i ch made me smart 😉 , Exhaust gas recirculation sensor A-Fehlfunktion Stromkreis would be my question : if the AGR valve is defective then the car does not start ? only about this is my first and not whether the glow plugs or diesel filters etc. and the glow plugs can be checked as a loan with voltmeter out through ? KangooPrivileg /Diesel / Built 2005 / 60KW grußausB