Engine Mechanical problem
2005 Citroen C4 4 cyl Front Wheel Drive Automatic 15000 miles

My car drives really well and starts first time during the day but starting on a cold frosty morning is very difficult.
Sometimes it takes 5/6 long tries before it starts.
Sometimes it starts in economy mode and either does or doesn't kick in after a few seconds.
When it starts in economy mode the engine management light stays on. Have had it code read - nothing1
Could it be something to do with the automatic choke?