1993 ETC...I just got my brake pads changed in the back, and now upon startup, the ABS light comes on and the Traction Disabled notification comes up. This has happened before, they would come on like 1 in 10 times I would start up the car for like a week, but then it never came back. Now a few weeks later I got the pads changed. The car was had two low brake fluid engine codes, but my brake fluid is at max. What's up?

I just had this exact problem if you look a few posts back. Changed the rear pads, abs came on/traction dissabled. Guaranteed speed sensor plug at the back of the caliper assy. (check connection)

probably air in the system, have you brake line bleed. Maybee the person who changed your pads may not have open the bleeder valve and maybee damaged the sensor also.