Hi there all wonder if anyone can help this is my own truck when driving in wet conditions vehicle runs fine on motorway but when you come to slow down it randomly just cuts out and will not start again for around half an hour I have several codes all undocumented as follows:

1 01648 undocumented code
2 01393 " "
3 00832 " "
4 00832 " "
5 00821 " "
6 00821 " "

I find information is very limited for this model as it is more commercial If I could get a clue what some of these fault codes are it will give me somewhere to start vehicle runs fine at all other times thanks very much to anyone who can help.