CONTROLLING NOX EMISSION CONTROL DURING START OF A VEHICLE

The invention relates to a method for NOx emission control during start of a vehicle (1) comprising an exhaust aftertreatment system (300), an engine (2), and a NOx sensor (308), the method comprising the steps of: determining (S102) a temperature of the NOx sensor; if the determined temperature of the NOx sensor is below a predetermined threshold, initiating (S104) heating of the NOx sensor, and performing (S106) a preventive action for delaying engine start until a determined temperature of the NOx sensor exceeds or is equal to the predetermined threshold. [0002] The invention also relates to an exhaust aftertreatment system, a vehicle comprising such a system, a computer program, a computer readable medium and a control unit configured to perform the method.