Scooter

Hi All please can anyone help, I have a 2010 diesel x trail. It's been fine for a year and then recently it just dies when started from cold after about 5mins driving. It starts again with a struggle then fine all day. Its had a new battery. No faults codes. Cleaned EGR valve. I did put fuel system cleaner in it and since that and the EGR valve clean it doesn't cut out every day. Any ideas? Thanks