Spurious ABS at very low speed?

2004 Camry with about 160K miles (and I hope to drive it until the kids take away my keys in a few years).

For the last month or two, sometimes when I’m slowing gently almost to a stop, I get what I think is ABS activation: loudish fast pulsing sound (roughly five pulses/sec; almost a vibration) that I can feel in the brake pedal. Maybe more likely on a slow speed turn while braking (I do a half-K turn to back into my driveway).

Is that ABS? Does this require fast attention?

Would my mechanic’s code readers be able to find any useful codes? (Or do I just report the symptom and let him/them investigate?)

Any ideas about possible cause? Any chance it’s related to the groaning sound: What's that groaning sound?

What is the condition of your tires?