Motoring writer Gareth Butterfield points out the problems that can be fixed in cars just by charging or changing the 12v ...

Should it start flashing while traveling above 20 mph, it means the battery isn't being charged ... We'll start with the worst. The check-engine light is the one car owners hate most.

including engine monitor status that will turn on the check engine light. Here's how to do it: Plug the battery memory saver ...

The average battery life in the northeast is about ... I had it serviced recently, and the car runs great, but the check-engine light is on. My shop is telling me it could be another $1,200 ...

A weak battery can wreak havoc with all sorts of sensors, and this could mean you're very likely to see an orange "check engine" light appear on your instrument cluster as the car records a fault.