The check engine light may not go off after driving awhile simply because the battery was changed. The check engine light is triggered by the vehicle's onboard diagnostics system (OBD) when it detects a problem with the engine or emissions control system. Changing the battery does not address the underlying issue that caused the check engine light to come on in the first place.
To have the check engine light turned off, you will need to address the problem that caused it to come on in the first place. This may involve having the vehicle diagnosed by a mechanic to identify the specific issue and then performing the necessary repairs.
