check engine light reset?

you need a scan tool to reset the check engine light. you can buy a cheap one at an auto parts store for about $30 or you can take it to a shop and they'll probably reset it for pretty cheap. if you havent corrected the problem thats causing the light to come on then it will probably come back after the reset.

This video will show you how

https://youtu.be/ahK_eucFi-k

I am in the service I have been away for 9 months I replaced my battery and now my computer needs to be reset I need your help

Your battery needs to be registered with the computer and that can only be done with a professional scan tool so you will likely have to visit a well equipped shop to do that.

How do you reset check engine light?

An error has been detected by the engine management system and you need to rectify the fault before it can be reset. Retrieve the trouble codes and let us know what it is and we can advise on how to rectify the problem.