Hi. 2011 fiat 500. Just done ODB check, code P0204 came up, was able to erase. says it is to do with injector 4. As you look into the engine from the front can any one tell me which is injector 4, left or right. any advise, will injector cleaner do any good?? Thanks

Injector 4 is right.

Is it a diesel or petrol engine?

Hi thanks for reply. I have changed injector 4 (near side of engine) at pressent has solved problem