Nozzle Offset Probe Failed

[mkentisaacs 0]

I've run every diagnostic possible from the menu, manual levelling, lever check etc., and when I calibrate the x/y offset it prints the pattern perfectly every time without issue. When I try to run a print (successful on other S3 machines), however, it gives me the "nozzle offset probe failed" error. Where do I go from here (reluctant to start messing with wires and internals)? I updated the firmware yesterday and now when I check the levelling sensor it says "noise is 3.3/3.4" - what does this mean? Thank you for any and all help.