The Encourager
The Encourager
The battery helps the alternator. And your alternator charges your battery while your battery supplies power to your car. The failures of a battery are sudden, while failures of a failing alternator are slow. Always check your battery first, it can generally tell you which of these two is the culprit.Was the battery, though I don't know how the battery could trigger the check engine light.
The reason I know I had that problem with my battery about 3 weeks ago.