My abs light and ets light come on. Is it safe to drive?

Hello, Most often when brake pads are changed followed by the ABS light, a wheel sensor was either not plugged back in, plugged in incorrectly/dirty, or the caliper was allowed to hang on the speed sensor wiring (pigtail) which can cause breakage in the wires. That aside, if you are squeaking on the left, especially when making a right turn, you likely have a bad wheel bearing, which would also cause your ABS light to illuminate after the wheel speed sensor becomes covered in metal shavings, or after the bearing has degraded too far. Have that corner of the vehicle inspected, and check your codes to learn why the ABS light is on.