Please help, this is frustrating

So I have a 2008, 1.6 petrol C4 hatchback.

While idling the engine randomly misfires and while accelerating at low rpms (full throttle) it will also start chugging.

While on idle I get no error codes no matter how long it takes and shakes the engine.

So far I have changed the spark plugs (car runs on petrol and lpg), and no matter what the setting is, the symptoms are the same. So fuel injectors and gasoline pump / fuel system is not to blame.

The last error codes I got (used lexia were):
http://imgur.com/a/XyZ9g

Please help, desperate here.

I also noticed that the random misfires occur only when the engine is at working temps and not when it starts cold.