When starting the engine, all the lights are working but the engine makes a clicking noise repeatedly. I was told it could be the battery, but I really do not know what to do. If I change the battery, do I need to configurate the computer? Thanks.

Hi, I own an automatic Vectra CD 2.2 16v and my problem is that the Check turns on constantly when accelerating, and I feel the car loses power when this happens. The Check turns on and suddenly disappears; if it does not turn off, I accelerate it suddenly and it goes away. I've already cleaned injectors and I always use injection cleaning fluid so that they are not blocked. Still, I cannot find the failure that is causing my problem. I know there is a sensor next to the camshaft, on top of the cover, and also the rpm sensor; but I've checked them and I did not find any failure. If anyone knows anything about it, please let me know. Because the fuel consumption is higher as well.

Good afternoon, I have a Vectra 2006 v6 with 90000 miles and, when starting it in the morning, it accelerates normally at the beginning but immediately starts failing. It is only after I turn the engine off and start it again twice that the failure disappears, and the car works perfectly the rest of the day.