diff --git a/homeassistant/components/co2signal/config_flow.py b/homeassistant/components/co2signal/config_flow.py
index 3313d01be85..622c09f0d38 100644
--- a/homeassistant/components/co2signal/config_flow.py
+++ b/homeassistant/components/co2signal/config_flow.py
@@ -13,7 +13,7 @@ from aioelectricitymaps import (
 )
 import voluptuous as vol
 
-from homeassistant.config_entries import ConfigEntry, ConfigFlow, ConfigFlowResult
+from homeassistant.config_entries import SOURCE_REAUTH, ConfigFlow, ConfigFlowResult
 from homeassistant.const import (
     CONF_API_KEY,
     CONF_COUNTRY_CODE,
@@ -42,7 +42,6 @@ class ElectricityMapsConfigFlow(ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
     _data: dict | None
-    _reauth_entry: ConfigEntry | None = None
 
     async def async_step_user(
         self, user_input: dict[str, Any] | None = None
@@ -128,9 +127,6 @@ class ElectricityMapsConfigFlow(ConfigFlow, domain=DOMAIN):
         self, entry_data: Mapping[str, Any]
     ) -> ConfigFlowResult:
         """Handle the reauth step."""
-        self._reauth_entry = self.hass.config_entries.async_get_entry(
-            self.context["entry_id"]
-        )
         return await self.async_step_reauth_confirm()
 
     async def async_step_reauth_confirm(
@@ -165,12 +161,10 @@ class ElectricityMapsConfigFlow(ConfigFlow, domain=DOMAIN):
             except ElectricityMapsError:
                 errors["base"] = "unknown"
             else:
-                if self._reauth_entry:
+                if self.source == SOURCE_REAUTH:
                     return self.async_update_reload_and_abort(
-                        self._reauth_entry,
-                        data={
-                            CONF_API_KEY: data[CONF_API_KEY],
-                        },
+                        self._get_reauth_entry(),
+                        data_updates={CONF_API_KEY: data[CONF_API_KEY]},
                     )
 
                 return self.async_create_entry(