headlights come on with key

hello i was wondering if anybody could help me my headlights have started coming on and showing the green light on the dash it happens when i turn the key on but go out if when you turn key off i have treid turning lights off on stalk switch not nothing happens also i have no mainbeam working at first lights used to turn themselfs on when i used indicators and i was told needed a coms unit si i got replacement coms unit with matching numbers anf fitted it now got this problem i hope somebody can help

Hi.

You had a problem with the com2000 and changed it.

Now the headlights don't work as they used to and come on with the key and you have no main beam.

I would start with lexia (info here) and check the BSI is configured to communicate with the replacement COM2000 unit because it sounds like a communication issue you have.

Either that or another faulty com2000, but lexia can help you with that too .

ok thanks for a fast reply i will try and find a auto electrician me with lexia system because probably be cheaper than citroen dealer and i dont have a lexia system just a basic obd ii reader but that wont read all the codes again thanks for your help