I am having a few problems with my 53 plate 2.2cdti Signum.

When I stop at junction the engine management light comes on. It sometimes goes out after starting off.
I call the RAC out and they cleared the following error codes:

P0105
P0234
P1105

Since he cleared the codes it has not done it again.

I have read up on what the meaning of the codes but not sure of the cause!!!

Any help would be very much appreciated as I am planning a trip to Scotland next weekend!

Thanks.