But judging by your other thread it is certainly effecting things. I'd get it checked out. Take the car to a dealer or auto electrician, get them to hook it up to a diagnostic computer, find out when error messages it's getting.
have you sort out what the matter with the injection light?. Mine have same problem, no solution yet. The only garage in the area who got the com examiner is out. Its effecting the engine performance. pls help me