Continuous Flashing Hazards and now ABS Failure

in post #9, he says he unplugged a wire from the abs. is that the wire you cut?

 

It's tough to say what that "scenario" is, given that you get the same lights for a whole lot of different brake system issues (and even some non-brake-system issues that the brake system ends up knowing about). It's the trouble codes that reveal what the issue is. So it is good that the shop did this:

However, people sometimes read too much into a trouble code. An ECU in a car can only tell you things it would have some way of knowing. If the signal coming into the ECU from a wheel speed sensor seems weird, the ECU can tell you that. But it can't tell you why it's weird. A human needs to figure that out. Is the sensor itself bad? Is there damage to the wiring from the sensor to the ECU at the front of the car? Or is something wrong in the ECU itself? All those things are possible, and the code doesn't say which is the answer for you.

Cutting the sky-blue HZRI wire will not have caused any speed sensor codes.

If the sensor was replaced the first time just assuming it was the reason for the code, before checking other possibilities like the wiring from the sensor to the front, it's possible the sensor never was the original problem, and the real problem still is whatever it was. That would make this a good time to work through the troubleshooting steps for the code and try to pin down what the real cause is. (Not saying it can't be another bad sensor! Such things can happen. But you'll know, if you go through the troubleshooting steps and that's where they lead.)

One more possibility not to leave out: we know the sky-blue HZRI wire got cut for a reason. It got cut because the ECU was putting a goofy signal on it causing the lights to flash; that definitely is a failure of a circuit inside the ECU. Cutting the wire stops the goofy signal from reaching the lights to flash them. But it doesn't heal the ECU. We know for sure one thing has gone wrong inside that ECU.

If it were to turn out that the wheel-speed-sensor error is also caused by something (else) going wrong inside that ECU, that wouldn't be too hard to believe.