How can you tell whether the voltage regulator is damaged?

Different sensors may trigger either a battery light or a check engine light, depending on whether your voltage regulator is overcharging or undercharging your battery. If either of these lights comes on, you need to stop driving right away. Your car might either completely stop working or the battery could overload and blow out. In any case, nothing constructive will result from it. To find out if one of these two dashboard lights has ever been on when a MOT has failed, search "check MOT history" online. Read more