diff --git a/app/code/Magento/CustomerGraphQl/Model/Customer/CheckCustomerPassword.php b/app/code/Magento/CustomerGraphQl/Model/Customer/CheckCustomerPassword.php
index f3c03e5fc18a..3cc831e1ca40 100644
--- a/app/code/Magento/CustomerGraphQl/Model/Customer/CheckCustomerPassword.php
+++ b/app/code/Magento/CustomerGraphQl/Model/Customer/CheckCustomerPassword.php
@@ -9,7 +9,12 @@
 
 use Magento\Customer\Model\AuthenticationInterface;
 use Magento\Framework\Exception\InvalidEmailOrPasswordException;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Framework\Exception\NoSuchEntityException;
+use Magento\Framework\Exception\State\UserLockedException;
 use Magento\Framework\GraphQl\Exception\GraphQlAuthenticationException;
+use Magento\Framework\GraphQl\Exception\GraphQlInputException;
+use Magento\Framework\GraphQl\Exception\GraphQlNoSuchEntityException;
 
 /**
  * Check customer password
@@ -36,15 +41,21 @@ public function __construct(
      * @param string $password
      * @param int $customerId
      * @throws GraphQlAuthenticationException
+     * @throws GraphQlInputException
+     * @throws GraphQlNoSuchEntityException
      */
     public function execute(string $password, int $customerId)
     {
         try {
             $this->authentication->authenticate($customerId, $password);
         } catch (InvalidEmailOrPasswordException $e) {
-            throw new GraphQlAuthenticationException(
-                __('The password doesn\'t match this account. Verify the password and try again.')
-            );
+            throw new GraphQlAuthenticationException(__($e->getMessage()), $e);
+        } catch (UserLockedException $e) {
+            throw new GraphQlAuthenticationException(__($e->getMessage()), $e);
+        } catch (NoSuchEntityException $e) {
+            throw new GraphQlNoSuchEntityException(__($e->getMessage()), $e);
+        } catch (LocalizedException $e) {
+            throw new GraphQlInputException(__($e->getMessage()), $e);
         }
     }
 }
diff --git a/app/code/Magento/CustomerGraphQl/Model/Customer/UpdateCustomerData.php b/app/code/Magento/CustomerGraphQl/Model/Customer/UpdateCustomerData.php
index 477235ee5692..a11f192668d2 100644
--- a/app/code/Magento/CustomerGraphQl/Model/Customer/UpdateCustomerData.php
+++ b/app/code/Magento/CustomerGraphQl/Model/Customer/UpdateCustomerData.php
@@ -9,14 +9,15 @@
 
 use Magento\Customer\Api\CustomerRepositoryInterface;
 use Magento\Framework\Exception\AlreadyExistsException;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Framework\Exception\NoSuchEntityException;
 use Magento\Framework\GraphQl\Exception\GraphQlAlreadyExistsException;
+use Magento\Framework\GraphQl\Exception\GraphQlAuthenticationException;
 use Magento\Framework\GraphQl\Exception\GraphQlInputException;
 use Magento\Framework\GraphQl\Exception\GraphQlNoSuchEntityException;
 use Magento\Store\Model\StoreManagerInterface;
 use Magento\Customer\Api\Data\CustomerInterface;
-use Magento\Customer\Api\Data\CustomerInterfaceFactory;
 use Magento\Framework\Api\DataObjectHelper;
-use Magento\Framework\Reflection\DataObjectProcessor;
 
 /**
  * Update customer data
@@ -38,21 +39,11 @@ class UpdateCustomerData
      */
     private $checkCustomerPassword;
 
-    /**
-     * @var CustomerInterfaceFactory
-     */
-    private $customerFactory;
-
     /**
      * @var DataObjectHelper
      */
     private $dataObjectHelper;
 
-    /**
-     * @var DataObjectProcessor
-     */
-    private $dataObjectProcessor;
-
     /**
      * @var array
      */
@@ -62,26 +53,20 @@ class UpdateCustomerData
      * @param CustomerRepositoryInterface $customerRepository
      * @param StoreManagerInterface $storeManager
      * @param CheckCustomerPassword $checkCustomerPassword
-     * @param CustomerInterfaceFactory $customerFactory
      * @param DataObjectHelper $dataObjectHelper
-     * @param DataObjectProcessor $dataObjectProcessor
      * @param array $restrictedKeys
      */
     public function __construct(
         CustomerRepositoryInterface $customerRepository,
         StoreManagerInterface $storeManager,
         CheckCustomerPassword $checkCustomerPassword,
-        CustomerInterfaceFactory $customerFactory,
         DataObjectHelper $dataObjectHelper,
-        DataObjectProcessor $dataObjectProcessor,
         array $restrictedKeys = []
     ) {
         $this->customerRepository = $customerRepository;
         $this->storeManager = $storeManager;
         $this->checkCustomerPassword = $checkCustomerPassword;
-        $this->customerFactory = $customerFactory;
         $this->dataObjectHelper = $dataObjectHelper;
-        $this->dataObjectProcessor = $dataObjectProcessor;
         $this->restrictedKeys = $restrictedKeys;
     }
 
@@ -91,24 +76,23 @@ public function __construct(
      * @param int $customerId
      * @param array $data
      * @return void
-     * @throws GraphQlNoSuchEntityException
-     * @throws GraphQlInputException
      * @throws GraphQlAlreadyExistsException
+     * @throws GraphQlInputException
+     * @throws GraphQlNoSuchEntityException
+     * @throws GraphQlAuthenticationException
      */
     public function execute(int $customerId, array $data): void
     {
-        $customer = $this->customerRepository->getById($customerId);
-        $newData = array_diff_key($data, array_flip($this->restrictedKeys));
-
-        $oldData = $this->dataObjectProcessor->buildOutputDataArray($customer, CustomerInterface::class);
-        $newData = array_merge($oldData, $newData);
+        try {
+            $customer = $this->customerRepository->getById($customerId);
+        } catch (NoSuchEntityException $e) {
+            throw new GraphQlNoSuchEntityException(__($e->getMessage()), $e);
+        } catch (LocalizedException $e) {
+            throw new GraphQlInputException(__($e->getMessage()), $e);
+        }
 
-        $customer = $this->customerFactory->create();
-        $this->dataObjectHelper->populateWithArray(
-            $customer,
-            $newData,
-            CustomerInterface::class
-        );
+        $filteredData = array_diff_key($data, array_flip($this->restrictedKeys));
+        $this->dataObjectHelper->populateWithArray($customer, $filteredData, CustomerInterface::class);
 
         if (isset($data['email']) && $customer->getEmail() !== $data['email']) {
             if (!isset($data['password']) || empty($data['password'])) {
@@ -128,6 +112,8 @@ public function execute(int $customerId, array $data): void
                 __('A customer with the same email address already exists in an associated website.'),
                 $e
             );
+        } catch (LocalizedException $e) {
+            throw new GraphQlInputException(__($e->getMessage()), $e);
         }
     }
 }
diff --git a/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/UpdateCustomerTest.php b/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/UpdateCustomerTest.php
index fc7dd4a6dc23..ef5d00b213b2 100644
--- a/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/UpdateCustomerTest.php
+++ b/dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/UpdateCustomerTest.php
@@ -70,6 +70,7 @@ public function testUpdateCustomer()
             taxvat: "{$newTaxVat}"
             email: "{$newEmail}"
             password: "{$currentPassword}"
+            gender: "{$newGender}"
         }
     ) {
         customer {
@@ -96,6 +97,7 @@ public function testUpdateCustomer()
         $this->assertEquals($newDobDate->format('Y-m-d'), $response['updateCustomer']['customer']['dob']);
         $this->assertEquals($newTaxVat, $response['updateCustomer']['customer']['taxvat']);
         $this->assertEquals($newEmail, $response['updateCustomer']['customer']['email']);
+        $this->assertEquals($newGender, $response['updateCustomer']['customer']['gender']);
     }
 
     /**