vivaro glowplug light on, fault codes, please help

Hi all,

I have a vauxhall vivaro 1.9 cdti 2005,

Basically about 8 months ago the glowplug light came on, soon as you start the van it comes on after about 3 seconds, if you drive the van under the 3 second of starting it the light will stay off until i come to some traffic lights and have to idle, overall the light isnt effecting the performance much really.

my mate connected the snap on diagnostics machine to it and it came back quite a few codes i think about 6 in total, my mate thought it...

vivaro glowplug light on, fault codes, please help