If a 2017 Corolla's cruise control is not working, what is the cause?

When Your 2017 Toyota Corolla's cruise control fails, there's a small handful of reasons that are typically at the bottom of it. First, You should try the simple thing; is Your ABS light or traction control light on If it is, Your Corolla won't let You enter cruise control, for safety reasons. Presumably though, You'd have already checked that. More likely it will be a broken actuator to throttle cable, a failed vacuum hose, or a defective vacuum actuator. You may also want to check Your cruise control fuse; this one might draw a little negativity though, since fuses aren't a cause, but rather a symptom. Even if You find that it's Your fuse, You should keep digging around for WHAT blew the fuse, or else You'll run into the same issue again.