good evening to everyone

i need some help.i have a check engine.the VAG com says that i have poor mixture.

where i can start my reserch for solution?

i have the 1.4 bbz engine. 

It's usually a dirty pre-cat lambda probe, possibly oil fouling, have a look at your spark plugs to see if you're burning any oil.

 

Take the car for a good fast run to burn it clean if all is good and clear the code.