I have a 2013 Altima Sl and the LDW and BSW popped up on my dash saying “malfunction see owners manual.” It would only come on when I went through drive-thur's, and when I turned off my car the lights would go off but they have now been on for over 24 hours. Along with those lights my ABS and traction control lights come on too. Then an IBA light came on but after unhooking my battery that went off. I’m not sure what it could be.

Did you recently drive through any deeper water puddles? Makes me wonder if there was some moisture in the connections? Or dirt/mud? Not exactly sure where the LDW/BSW sensors are on these cars, but I would imagine dirt could impede their function. Just a shot in the dark.