That you'r cars alternator don't work properly ! eithter the "fanbelt" is broken or the alternator coal is bad .
It means there is a serious problem that must be repaired immediately.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
alternator is not charging battery, or loose - corroded connection on battery cables
The warning lights on a 1999 Passat mean different things depending on the particular light. Some of the common ones include hand brake light, check engine, oil light and so many more.
that could mean so many things...
daytime running lights
it's Daytime Running Lights.
Most cases the battery light comes on because the alternator isn't charging. The alternator may need replaced as well as the battery. It may be something more simple as a poor connection.
Your alternator is defective and not recharging the battery. Have the alternator checked.
you should check your engine...like now...
Bad Alternator or the Battery possibly is losing voltage. I replaced the alternator and serpentine belt before thinking it was the battery. The battery was only 16 months old. But it turned out to be the bad source.
The alternator is over or under charging.The alternator is over or under charging.