Thank you so much. I actually did have to change the battery, at which point the BAS/ESP light went off, but now the ABS light stays on. Just last week, however, in the fast lane on an L.A. freeway I had to stop quickly and from the way my brakes responded, I'm sure the ABS is functional.
you likely do not have any brake lights; you positively do not have Brake Assist, Electronic Stability Program and also may not have Anti Lock Brakes. the answer is YES, it is hazardous. you FIRST need to have someone scan all the diagnostic modules for codes. you may have another issue.