I basically treat it as a "hey it's moist!" notification
That's not something that I would leave as-is. Maybe is just an ABS sensor that is cracked. Or can be something worse.
Example: My colleague had issues happening on wet days for about a year (not just code, but vibrations too). Took the car to 3 different shops that wanted to replace the AC compressor, alternator, accessory belt idler (that one he accepted)...
Only to see one day that the serpentine belt was miss-aligned on the new tensioner. Took the car to the shop only to find out that the rubber on the harmonic balancer was basically broken apart and the balancer pulley was "walking out" from crankshaft. That would have damaged lots of things if really flew out while driving.
The same rubber broke off in my Sonata and was making squeaking noises when road was wet (water spray). I only find it when I was doing timing belt, when I saw that the timing marks where completely off (that separated part rotated).