diff --git a/xarray/plot/facetgrid.py b/xarray/plot/facetgrid.py
index f04092256c4..68edb58bd32 100644
--- a/xarray/plot/facetgrid.py
+++ b/xarray/plot/facetgrid.py
@@ -514,7 +514,6 @@ def map_plot1d(
                 mappable = func(
                     subset,
                     x=coords_to_plot["x"],
-                    y=coords_to_plot["y"],
                     z=coords_to_plot["z"],
                     ax=ax,
                     hue=hue,