while in 2wd grinding noise from drivers side wheel when turning in snow/water

What is your question?

recently while driving through small snow drifts or water and making right turns i hear a grinding noise. Sounds like worn out pad on a bad rotor, Noise only from left front wheel, not when in 4wd though. ususally occurs when brake applied but recently occured when driving through larger drift of snow and no brake applied. took to shop they pulled entire wheell assembly apart and found no mechanical issue (loose brake pads, caliper, bad rotors-nothing) they sugested possible ABS system sensor or faulty module and take to dealer.

What makes this problem better or worse?

snow and water

How long has your 2006 Nissan Xterra had this problem?

a few days-bad weather