i haven't owned a car new enough to have ever worked on ABS. I had to look up "reluctor", at first I thought it might be the same as a "flux capacitor" ;-)
all I could add is that if it has that device in the brake lines with a piston it's used to shut off a leaky circuit and allow pressure to what's left.. That thing has a piston that moves and a wire that senses the position of the piston. the right bleeding sequence procedure can reset it to the middle where it lives, I'm sure it can be checked electrically.
If it has that, it might be pertinent to follow the right bleeding sequence to reset it but that may not even exist on your car. I think on previous models, if you happened to have a hose off and pressed the brake by accident it may shift the spool in that thing and cause a warning light but this is not really related to the ABS.
otherwise you are getting better advice than I can offer..
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