If the brake pads are not worn out check the backing plate. It is the thin metal plate behind the brake rotor, sometimes it will get bent and rub on the brake rotor.
Not usually, unless the CPU is less than 6 months old.
If the vehicle itself has ABS, the entire braking system will have it.
Check the pipe inside the U part of the axle housing itself. They like to break out by the edges.
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The code C121C means that there is a problem in the anti-lock portion of your braking system. The code itself reads "Torque Request Signal Denied".This is a safety issue, Under hard braking the anti-lock could FAIL .
Redundancy, if one fails the other is probably still working and can stop the vehicle by itself.
On the firewall, driver's side, right in the corner closest to the driver, all by itself.
Yes, but not as safe as when it is off.AdvanceTrac constantly monitors the vehicle motion relative to the driver's intended course.There are wheel-speed sensors to monitor the Traction Control and anti-lock braking system (ABS) and the ADVTRAC light indicates either a fault in the system, or a fault in one of the sensors itself. This is rarely a problem that interferes with normal driving or braking, but the system needs to be checked for faults, loose connections, or related problems. Often the replacement of a faulty sensor will resolve the problem.
A display driver is required for the system itself to display anything, so essentially no, there isn't.
Get your Anti-Lock Braking system diagnosed and repaired by a qualified professional. Then the light will turn itself off.
A scanner is both hardware and software, the device itself is hardware (all devices are hardware) but the driver(a program) that runs it is software.