I have a 1.5 diesel renault megane 05 plate the problem
with it is i was driving to work when the check injection light came on
As car was running ok i continued to work the thing is after the car had bee n standing all day when i went to go home the car was difficult to start and when it fired up there was a lot of smoke and a tapping sound but still drove ok

frank, February 2015

As with most modern vehicles it is impossible to determine your best course of action until it has been on the proper computer/code reader.

cdc, February 2015