diff --git a/homeassistant/components/p1_monitor/strings.json b/homeassistant/components/p1_monitor/strings.json
index c28a7129006..fba7973528e 100644
--- a/homeassistant/components/p1_monitor/strings.json
+++ b/homeassistant/components/p1_monitor/strings.json
@@ -10,8 +10,7 @@
       }
     },
     "error": {
-      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
-      "unknown": "[%key:common::config_flow::error::unknown%]"
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]"
     }
   }
 }
\ No newline at end of file
diff --git a/homeassistant/components/p1_monitor/translations/en.json b/homeassistant/components/p1_monitor/translations/en.json
index 34b64082b43..4bd61c19bdc 100644
--- a/homeassistant/components/p1_monitor/translations/en.json
+++ b/homeassistant/components/p1_monitor/translations/en.json
@@ -1,8 +1,7 @@
 {
     "config": {
         "error": {
-            "cannot_connect": "Failed to connect",
-            "unknown": "Unexpected error"
+            "cannot_connect": "Failed to connect"
         },
         "step": {
             "user": {