diff --git a/src/rivian/exceptions.py b/src/rivian/exceptions.py
index 530644d..0a61bbd 100644
--- a/src/rivian/exceptions.py
+++ b/src/rivian/exceptions.py
@@ -1,2 +1,17 @@
 class RivianExpiredTokenError(Exception):
-    """Access Token Expired Error"""
\ No newline at end of file
+    """Access Token Expired Error"""
+
+class RivianUnauthenticated(Exception):
+    """User Token Invalid Error"""
+
+class RivianInvalidCredentials(Exception):
+    """Invalid User Credentials - Check Username and Password"""
+
+class RivianInvalidOTP(Exception):
+    """User's One Time Password Invalid - Try Again"""
+
+class RivianDataError(Exception):
+    """Rivian Server Data Error"""
+
+class RivianTemporarilyLockedError(Exception):
+    """Rivian User Temporarily Locked Error"""
\ No newline at end of file
diff --git a/src/rivian/rivian.py b/src/rivian/rivian.py
index bdf47e5..922c9c6 100644
--- a/src/rivian/rivian.py
+++ b/src/rivian/rivian.py
@@ -7,6 +7,7 @@
 import json
 import socket
 import random
+import uuid
 
 import logging
 
@@ -14,7 +15,7 @@
 import async_timeout
 from yarl import URL
 
-from rivian.exceptions import RivianExpiredTokenError
+from rivian.exceptions import *
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -54,6 +55,7 @@ def __init__(
         self.request_timeout = request_timeout
 
         self._otp_needed = False
+        self._otp_token = ""
 
     async def authenticate(
         self,
@@ -344,6 +346,7 @@ async def authenticate_graphql(
                 "Csrf-Token": self._csrf_token,
                 "A-Sess": self._app_session_token,
                 "Apollographql-Client-Name": "com.rivian.ios.consumer-apollo-ios",
+                "Dc-Cid": f"m-ios-{uuid.uuid4()}",
             }
         )
 
@@ -356,9 +359,53 @@ async def authenticate_graphql(
         response = await self.__graphql_query(headers, url, graphql_json)
 
         response_json = await response.json()
-        self._access_token = response_json["data"]["login"]["accessToken"]
-        self._refresh_token = response_json["data"]["login"]["refreshToken"]
-        self._user_session_token = response_json["data"]["login"]["userSessionToken"]
+
+        login_data = response_json["data"]["login"]
+
+        if "otpToken" in login_data:
+            self._otp_needed = True
+            self._otp_token = login_data["otpToken"]
+        else:
+            self._access_token = login_data["accessToken"]
+            self._refresh_token = login_data["refreshToken"]
+            self._user_session_token = login_data["userSessionToken"]
+
+        return response
+
+    async def validate_otp_graphql(self, username: str, otpCode: str) -> dict[str, Any]:
+        """Validates OTP against the Rivian GraphQL API with Username, OTP Code, and OTP Token"""
+
+        url = GRAPHQL_GATEWAY
+
+        headers = dict()
+        headers.update(BASE_HEADERS)
+        headers.update(
+            {
+                "Csrf-Token": self._csrf_token,
+                "A-Sess": self._app_session_token,
+                "Apollographql-Client-Name": "com.rivian.ios.consumer-apollo-ios",
+            }
+        )
+
+        graphql_json = {
+            "operationName": "LoginWithOTP",
+            "query": "mutation LoginWithOTP($email: String!, $otpCode: String!, $otpToken: String!) {\n  loginWithOTP(email: $email, otpCode: $otpCode, otpToken: $otpToken) {\n    __typename\n    ... on MobileLoginResponse {\n      __typename\n      accessToken\n      refreshToken\n      userSessionToken\n    }\n  }\n}",
+            "variables": {
+                "email": username,
+                "otpCode": otpCode,
+                "otpToken": self._otp_token,
+            },
+        }
+
+        response = await self.__graphql_query(headers, url, graphql_json)
+
+        response_json = await response.json()
+
+        login_data = response_json["data"]["loginWithOTP"]
+
+        self._access_token = login_data["accessToken"]
+        self._refresh_token = login_data["refreshToken"]
+        self._user_session_token = login_data["userSessionToken"]
 
         return response
 
@@ -499,23 +546,58 @@ async def __graphql_query(self, headers: dict(str, str), url: str, body: str):
                 "Error occurred while communicating with Rivian."
             ) from exception
 
-        if response.status != 200:
-            body = await response.text()
-            raise Exception(
-                "Error occurred while reading the graphql response from Rivian.",
-                response,
-                response.status,
-                body,
-            )
-
-        response_json = await response.json()
-        if "errors" in response_json:
-            raise Exception(
-                "Error occurred while reading the graphql response from Rivian.",
-                response,
-                response.status,
-                response_json,
-            )
+        try:
+            response_json = await response.json()
+            if "errors" in response_json:
+                for e in response_json["errors"]:
+                    extensions = e["extensions"]
+                    if extensions["code"] == "UNAUTHENTICATED":
+                        raise RivianUnauthenticated(
+                            response.status,
+                            response_json,
+                            headers,
+                            body,
+                        )
+                    elif extensions["code"] == "DATA_ERROR":
+                        raise RivianDataError(
+                            response.status,
+                            response_json,
+                            headers,
+                            body,
+                        )
+                    elif extensions["code"] == "BAD_CURRENT_PASSWORD":
+                        raise RivianInvalidCredentials(
+                            response.status,
+                            response_json,
+                            headers,
+                            body,
+                        )
+                    elif (
+                        extensions["code"] == "BAD_USER_INPUT"
+                        and extensions["reason"] == "INVALID_OTP"
+                    ):
+                        raise RivianInvalidOTP(
+                            response.status,
+                            response_json,
+                            headers,
+                            body,
+                        )
+                    elif extensions["code"] == "SESSION_MANAGER_ERROR":
+                        raise RivianTemporarilyLockedError(
+                            response.status,
+                            response_json,
+                            headers,
+                            body,
+                        )
+                raise Exception(
+                    "Error occurred while reading the graphql response from Rivian.",
+                    response.status,
+                    response_json,
+                    headers,
+                    body,
+                )
+        except Exception as exception:
+            raise exception
 
         return response