Driving a 2006 Honda Civic, right rear brake makes a clunking noise under medium to high braking. It sounds like the ABS but doesn't have the pedal pushing back like ABS does. Went to my usual mechanic, they checked everything over and said it was fine. No mechanical issues. They didn't take the car for a drive, acted like my imagination. Went to a 2nd mechanic who said it is low battery voltage. No posts about low voltage causing a noise. No brake or ABS lights are on. I dislike the idea of buying a new $200 battery to fix a brake knock. Unsure this is the real issue. Advice welcome. Anyone have this happen?
If low voltage was the cause of any problems with the ABS then you would have active and/or stored DTC's in the abs module. It would likely trigger the ABS light and might also disable the abs completely while the code is active. Even then Im not sure how this could create any kind of "clunking" noise. Sounds just as likely as me telling you your tail light fluid is leaking on the caliper, causing the pads to rub.
I am also not sure, is it a 2006 or 2016?