diff --git a/api/v1alpha1/fault_injection.go b/api/v1alpha1/fault_injection.go
index eab92714c5..3a91b7c3a5 100644
--- a/api/v1alpha1/fault_injection.go
+++ b/api/v1alpha1/fault_injection.go
@@ -53,6 +53,8 @@ type FaultInjectionAbort struct {
 	// GrpcStatus specifies the GRPC status code to be returned
 	//
 	// +optional
+	// +kubebuilder:validation:Minimum=0
+	// +kubebuilder:validation:Maximum=16
 	GrpcStatus *int32 `json:"grpcStatus,omitempty"`
 
 	// Percentage specifies the percentage of requests to be aborted. Default 100%, if set 0, no requests will be aborted. Accuracy to 0.0001%.
diff --git a/charts/gateway-crds-helm/templates/generated/gateway.envoyproxy.io_backendtrafficpolicies.yaml b/charts/gateway-crds-helm/templates/generated/gateway.envoyproxy.io_backendtrafficpolicies.yaml
index 856f8d8522..1f35b5da3e 100644
--- a/charts/gateway-crds-helm/templates/generated/gateway.envoyproxy.io_backendtrafficpolicies.yaml
+++ b/charts/gateway-crds-helm/templates/generated/gateway.envoyproxy.io_backendtrafficpolicies.yaml
@@ -349,6 +349,8 @@ spec:
                         description: GrpcStatus specifies the GRPC status code to
                           be returned
                         format: int32
+                        maximum: 16
+                        minimum: 0
                         type: integer
                       httpStatus:
                         description: StatusCode specifies the HTTP status code to
diff --git a/charts/gateway-helm/charts/crds/crds/generated/gateway.envoyproxy.io_backendtrafficpolicies.yaml b/charts/gateway-helm/charts/crds/crds/generated/gateway.envoyproxy.io_backendtrafficpolicies.yaml
index aa12901fec..555021709e 100644
--- a/charts/gateway-helm/charts/crds/crds/generated/gateway.envoyproxy.io_backendtrafficpolicies.yaml
+++ b/charts/gateway-helm/charts/crds/crds/generated/gateway.envoyproxy.io_backendtrafficpolicies.yaml
@@ -348,6 +348,8 @@ spec:
                         description: GrpcStatus specifies the GRPC status code to
                           be returned
                         format: int32
+                        maximum: 16
+                        minimum: 0
                         type: integer
                       httpStatus:
                         description: StatusCode specifies the HTTP status code to
diff --git a/internal/gatewayapi/backendtrafficpolicy.go b/internal/gatewayapi/backendtrafficpolicy.go
index ef5b9086b7..036b9de0ef 100644
--- a/internal/gatewayapi/backendtrafficpolicy.go
+++ b/internal/gatewayapi/backendtrafficpolicy.go
@@ -1695,7 +1695,7 @@ func (t *Translator) buildFaultInjection(policy *egv1a1.BackendTrafficPolicy) *i
 			}
 
 			if policy.Spec.FaultInjection.Abort.GrpcStatus != nil {
-				fi.Abort.GrpcStatus = policy.Spec.FaultInjection.Abort.GrpcStatus
+				fi.Abort.GrpcStatus = new(uint32(*policy.Spec.FaultInjection.Abort.GrpcStatus))
 			}
 			if policy.Spec.FaultInjection.Abort.HTTPStatus != nil {
 				fi.Abort.HTTPStatus = policy.Spec.FaultInjection.Abort.HTTPStatus
diff --git a/internal/ir/xds.go b/internal/ir/xds.go
index 6e54220d4b..ca4c1aba64 100644
--- a/internal/ir/xds.go
+++ b/internal/ir/xds.go
@@ -1655,7 +1655,7 @@ type FaultInjectionAbort struct {
 	// HTTPStatus defines the HTTP status code to be returned.
 	HTTPStatus *int32 `json:"httpStatus,omitempty" yaml:"httpStatus,omitempty"`
 	// GrpcStatus defines the gRPC status code to be returned.
-	GrpcStatus *int32 `json:"grpcStatus,omitempty" yaml:"grpcStatus,omitempty"`
+	GrpcStatus *uint32 `json:"grpcStatus,omitempty" yaml:"grpcStatus,omitempty"`
 	// Percentage defines the percentage of requests to be aborted.
 	Percentage *float32 `json:"percentage,omitempty" yaml:"percentage,omitempty"`
 }
diff --git a/internal/ir/zz_generated.deepcopy.go b/internal/ir/zz_generated.deepcopy.go
index 5b47d06ccb..811b7791d6 100644
--- a/internal/ir/zz_generated.deepcopy.go
+++ b/internal/ir/zz_generated.deepcopy.go
@@ -1622,7 +1622,7 @@ func (in *FaultInjectionAbort) DeepCopyInto(out *FaultInjectionAbort) {
 	}
 	if in.GrpcStatus != nil {
 		in, out := &in.GrpcStatus, &out.GrpcStatus
-		*out = new(int32)
+		*out = new(uint32)
 		**out = **in
 	}
 	if in.Percentage != nil {
diff --git a/internal/xds/translator/fault.go b/internal/xds/translator/fault.go
index e017d00395..142fd58ea1 100644
--- a/internal/xds/translator/fault.go
+++ b/internal/xds/translator/fault.go
@@ -152,7 +152,7 @@ func (*fault) patchRoute(route *routev3.Route, irRoute *ir.HTTPRoute, _ *ir.HTTP
 		}
 		if abort.GrpcStatus != nil {
 			routeCfgProto.Abort.ErrorType = &xdshttpfaultv3.FaultAbort_GrpcStatus{
-				GrpcStatus: uint32(*abort.GrpcStatus),
+				GrpcStatus: *abort.GrpcStatus,
 			}
 		}
 	}
diff --git a/test/helm/gateway-crds-helm/all.out.yaml b/test/helm/gateway-crds-helm/all.out.yaml
index 3c3e2be7b4..517cc0d38c 100644
--- a/test/helm/gateway-crds-helm/all.out.yaml
+++ b/test/helm/gateway-crds-helm/all.out.yaml
@@ -22876,6 +22876,8 @@ spec:
                         description: GrpcStatus specifies the GRPC status code to
                           be returned
                         format: int32
+                        maximum: 16
+                        minimum: 0
                         type: integer
                       httpStatus:
                         description: StatusCode specifies the HTTP status code to
diff --git a/test/helm/gateway-crds-helm/e2e.out.yaml b/test/helm/gateway-crds-helm/e2e.out.yaml
index 5077a7985f..30f04545d2 100644
--- a/test/helm/gateway-crds-helm/e2e.out.yaml
+++ b/test/helm/gateway-crds-helm/e2e.out.yaml
@@ -849,6 +849,8 @@ spec:
                         description: GrpcStatus specifies the GRPC status code to
                           be returned
                         format: int32
+                        maximum: 16
+                        minimum: 0
                         type: integer
                       httpStatus:
                         description: StatusCode specifies the HTTP status code to
diff --git a/test/helm/gateway-crds-helm/envoy-gateway-crds.out.yaml b/test/helm/gateway-crds-helm/envoy-gateway-crds.out.yaml
index bffc9b1497..e0fdfc5155 100644
--- a/test/helm/gateway-crds-helm/envoy-gateway-crds.out.yaml
+++ b/test/helm/gateway-crds-helm/envoy-gateway-crds.out.yaml
@@ -849,6 +849,8 @@ spec:
                         description: GrpcStatus specifies the GRPC status code to
                           be returned
                         format: int32
+                        maximum: 16
+                        minimum: 0
                         type: integer
                       httpStatus:
                         description: StatusCode specifies the HTTP status code to