diff --git a/x-pack/plugins/observability/public/components/custom_threshold/components/custom_equation/custom_equation_editor.stories.tsx b/x-pack/plugins/observability/public/components/custom_threshold/components/custom_equation/custom_equation_editor.stories.tsx
index 87555634199e2..39e8d53576afb 100644
--- a/x-pack/plugins/observability/public/components/custom_threshold/components/custom_equation/custom_equation_editor.stories.tsx
+++ b/x-pack/plugins/observability/public/components/custom_threshold/components/custom_equation/custom_equation_editor.stories.tsx
@@ -8,6 +8,7 @@
 import { Meta, Story } from '@storybook/react/types-6-0';
 import React, { useCallback, useEffect, useState } from 'react';
 import { IErrorObject } from '@kbn/triggers-actions-ui-plugin/public';
+import { IUiSettingsClient } from '@kbn/core-ui-settings-browser';
 import { decorateWithGlobalStorybookThemeProviders } from '../../../../test_utils/use_global_storybook_theme';
 import {
   Aggregators,
@@ -70,6 +71,7 @@ const CustomEquationEditorTemplate: Story<CustomEquationEditorProps> = (args) =>
     const validationObject = validateCustomThreshold({
       criteria: [expression as CustomMetricExpressionParams],
       searchConfiguration: {},
+      uiSettings: {} as IUiSettingsClient,
     });
     setErrors(validationObject.errors[0]);
   }, [expression]);
diff --git a/x-pack/plugins/observability/public/components/custom_threshold/components/validation.test.ts b/x-pack/plugins/observability/public/components/custom_threshold/components/validation.test.ts
index ac1b545e4a302..f1c5bc9576763 100644
--- a/x-pack/plugins/observability/public/components/custom_threshold/components/validation.test.ts
+++ b/x-pack/plugins/observability/public/components/custom_threshold/components/validation.test.ts
@@ -5,7 +5,25 @@
  * 2.0.
  */
 
-import { EQUATION_REGEX } from './validation';
+import { IUiSettingsClient } from '@kbn/core-ui-settings-browser';
+import {
+  CustomMetricExpressionParams,
+  CustomThresholdExpressionMetric,
+} from '../../../../common/custom_threshold_rule/types';
+import { EQUATION_REGEX, validateCustomThreshold } from './validation';
+
+const errorReason = 'this should appear as error reason';
+
+jest.mock('@kbn/es-query', () => {
+  const actual = jest.requireActual('@kbn/es-query');
+  return {
+    ...actual,
+    buildEsQuery: jest.fn(() => {
+      // eslint-disable-next-line no-throw-literal
+      throw { shortMessage: errorReason };
+    }),
+  };
+});
 
 describe('Metric Threshold Validation', () => {
   describe('valid equations', () => {
@@ -30,4 +48,46 @@ describe('Metric Threshold Validation', () => {
       });
     });
   });
+  it('should throw an error when data view is not provided', () => {
+    const res = validateCustomThreshold({
+      uiSettings: {} as IUiSettingsClient,
+      searchConfiguration: {},
+      criteria: {
+        metrics: [
+          {
+            name: 'Test',
+            aggType: 'count',
+            field: 'system.cpu.cores',
+            filter: 'none valid filter',
+          },
+        ] as unknown as CustomThresholdExpressionMetric[],
+      } as unknown as CustomMetricExpressionParams[],
+    });
+    expect(res.errors.searchConfiguration[0]).toBe('Data view is required.');
+  });
+  it('should throw an error when filter query is not valid with reason', () => {
+    const res = validateCustomThreshold({
+      uiSettings: {
+        get: jest.fn(),
+      } as unknown as IUiSettingsClient,
+      searchConfiguration: {
+        index: 'test*',
+        query: {
+          language: `kuery`,
+          query: 'test:tet',
+        },
+      },
+      criteria: {
+        metrics: [
+          {
+            name: 'Test',
+            aggType: 'count',
+            field: 'system.cpu.cores',
+            filter: 'none valid filter',
+          },
+        ] as unknown as CustomThresholdExpressionMetric[],
+      } as unknown as CustomMetricExpressionParams[],
+    });
+    expect(res.errors.filterQuery[0]).toBe(`Filter query is invalid. ${errorReason}`);
+  });
 });
diff --git a/x-pack/plugins/observability/public/components/custom_threshold/components/validation.tsx b/x-pack/plugins/observability/public/components/custom_threshold/components/validation.tsx
index 2144757216fbe..eb7e86c090dc2 100644
--- a/x-pack/plugins/observability/public/components/custom_threshold/components/validation.tsx
+++ b/x-pack/plugins/observability/public/components/custom_threshold/components/validation.tsx
@@ -5,7 +5,8 @@
  * 2.0.
  */
 
-import { Query, SerializedSearchSourceFields } from '@kbn/data-plugin/common';
+import { IUiSettingsClient } from '@kbn/core-ui-settings-browser';
+import { getEsQueryConfig, Query, SerializedSearchSourceFields } from '@kbn/data-plugin/common';
 import { buildEsQuery, fromKueryExpression } from '@kbn/es-query';
 import { i18n } from '@kbn/i18n';
 import { ValidationResult } from '@kbn/triggers-actions-ui-plugin/public';
@@ -20,9 +21,11 @@ export const EQUATION_REGEX = /[^A-Z|+|\-|\s|\d+|\.|\(|\)|\/|\*|>|<|=|\?|\:|&|\!
 export function validateCustomThreshold({
   criteria,
   searchConfiguration,
+  uiSettings,
 }: {
   criteria: CustomMetricExpressionParams[];
   searchConfiguration: SerializedSearchSourceFields;
+  uiSettings: IUiSettingsClient;
 }): ValidationResult {
   const validationResult = { errors: {} };
   const errors: {
@@ -56,14 +59,17 @@ export function validateCustomThreshold({
       buildEsQuery(
         undefined,
         [{ query: (searchConfiguration.query as Query).query, language: 'kuery' }],
-        []
+        [],
+        getEsQueryConfig(uiSettings)
       );
     } catch (e) {
+      const errorReason = e.shortMessage || '';
       errors.filterQuery = [
         i18n.translate(
           'xpack.observability.customThreshold.rule.alertFlyout.error.invalidFilterQuery',
           {
-            defaultMessage: 'Filter query is invalid.',
+            values: { errorReason },
+            defaultMessage: `Filter query is invalid. {errorReason}`,
           }
         ),
       ];
diff --git a/x-pack/plugins/observability/public/plugin.ts b/x-pack/plugins/observability/public/plugin.ts
index d2dcf8c266976..5d6e825d83c43 100644
--- a/x-pack/plugins/observability/public/plugin.ts
+++ b/x-pack/plugins/observability/public/plugin.ts
@@ -320,7 +320,11 @@ export class Plugin
 
     coreSetup.application.register(app);
 
-    registerObservabilityRuleTypes(config, this.observabilityRuleTypeRegistry, logsExplorerLocator);
+    registerObservabilityRuleTypes(
+      this.observabilityRuleTypeRegistry,
+      coreSetup.uiSettings,
+      logsExplorerLocator
+    );
 
     const assertPlatinumLicense = async () => {
       const licensing = await pluginsSetup.licensing;
diff --git a/x-pack/plugins/observability/public/rules/register_observability_rule_types.ts b/x-pack/plugins/observability/public/rules/register_observability_rule_types.ts
index af92943f1cc55..1915778fc2c4b 100644
--- a/x-pack/plugins/observability/public/rules/register_observability_rule_types.ts
+++ b/x-pack/plugins/observability/public/rules/register_observability_rule_types.ts
@@ -7,7 +7,7 @@
 
 import { lazy } from 'react';
 import { i18n } from '@kbn/i18n';
-import type { SerializedSearchSourceFields } from '@kbn/data-plugin/common';
+import { SerializedSearchSourceFields } from '@kbn/data-plugin/common';
 import {
   ALERT_REASON,
   ALERT_RULE_PARAMETERS,
@@ -16,11 +16,14 @@ import {
 } from '@kbn/rule-data-utils';
 import type { DiscoverAppLocatorParams } from '@kbn/discover-plugin/common';
 import type { LocatorPublic } from '@kbn/share-plugin/common';
+import { IUiSettingsClient } from '@kbn/core-ui-settings-browser';
 import type { MetricExpression } from '../components/custom_threshold/types';
-import type { CustomThresholdExpressionMetric } from '../../common/custom_threshold_rule/types';
+import type {
+  CustomMetricExpressionParams,
+  CustomThresholdExpressionMetric,
+} from '../../common/custom_threshold_rule/types';
 import { getViewInAppUrl } from '../../common/custom_threshold_rule/get_view_in_app_url';
 import { SLO_ID_FIELD, SLO_INSTANCE_ID_FIELD } from '../../common/field_names/slo';
-import { ConfigSchema } from '../plugin';
 import { ObservabilityRuleTypeRegistry } from './create_observability_rule_type_registry';
 import { SLO_BURN_RATE_RULE_TYPE_ID } from '../../common/constants';
 import { validateBurnRateRule } from '../components/burn_rate_rule_editor/validation';
@@ -86,8 +89,8 @@ const getDataViewId = (searchConfiguration?: SerializedSearchSourceFields) =>
     : searchConfiguration?.index?.title;
 
 export const registerObservabilityRuleTypes = async (
-  config: ConfigSchema,
   observabilityRuleTypeRegistry: ObservabilityRuleTypeRegistry,
+  uiSettings: IUiSettingsClient,
   logsExplorerLocator?: LocatorPublic<DiscoverAppLocatorParams>
 ) => {
   observabilityRuleTypeRegistry.register({
@@ -117,7 +120,13 @@ export const registerObservabilityRuleTypes = async (
     ),
     priority: 100,
   });
-
+  const validateCustomThresholdWithUiSettings = ({
+    criteria,
+    searchConfiguration,
+  }: {
+    criteria: CustomMetricExpressionParams[];
+    searchConfiguration: SerializedSearchSourceFields;
+  }) => validateCustomThreshold({ criteria, searchConfiguration, uiSettings });
   observabilityRuleTypeRegistry.register({
     id: OBSERVABILITY_THRESHOLD_RULE_TYPE_ID,
     description: i18n.translate(
@@ -133,7 +142,7 @@ export const registerObservabilityRuleTypes = async (
     ruleParamsExpression: lazy(
       () => import('../components/custom_threshold/custom_threshold_rule_expression')
     ),
-    validate: validateCustomThreshold,
+    validate: validateCustomThresholdWithUiSettings,
     defaultActionMessage: thresholdDefaultActionMessage,
     defaultRecoveryMessage: thresholdDefaultRecoveryMessage,
     requiresAppContext: false,
diff --git a/x-pack/plugins/translations/translations/fr-FR.json b/x-pack/plugins/translations/translations/fr-FR.json
index aa6d0fa65b209..c812c47f9aa48 100644
--- a/x-pack/plugins/translations/translations/fr-FR.json
+++ b/x-pack/plugins/translations/translations/fr-FR.json
@@ -28657,7 +28657,6 @@
     "xpack.observability.customThreshold.rule.alertFlyout.dataViewError.noTimestamp": "La vue de données sélectionnée ne dispose pas de champ d'horodatage. Veuillez sélectionner une autre vue de données.",
     "xpack.observability.customThreshold.rule.alertFlyout.defineTextQueryPrompt": "Définir le filtre de recherche (facultatif)",
     "xpack.observability.customThreshold.rule.alertFlyout.error.equation.invalidCharacters": "Le champ d'équation prend en charge uniquement les caractères suivants : A-Z, +, -, /, *, (, ), ?, !, &, :, |, >, <, =",
-    "xpack.observability.customThreshold.rule.alertFlyout.error.invalidFilterQuery": "La requête de filtre n'est pas valide.",
     "xpack.observability.customThreshold.rule.alertFlyout.error.invalidSearchConfiguration": "La vue de données est requise.",
     "xpack.observability.customThreshold.rule.alertFlyout.error.metrics.aggTypeRequired": "L'agrégation est requise",
     "xpack.observability.customThreshold.rule.alertFlyout.error.metrics.fieldRequired": "Le champ est obligatoire",
diff --git a/x-pack/plugins/translations/translations/ja-JP.json b/x-pack/plugins/translations/translations/ja-JP.json
index 3d18f50bc4c88..10bbca87a9cad 100644
--- a/x-pack/plugins/translations/translations/ja-JP.json
+++ b/x-pack/plugins/translations/translations/ja-JP.json
@@ -28658,7 +28658,6 @@
     "xpack.observability.customThreshold.rule.alertFlyout.dataViewError.noTimestamp": "選択したデータビューにタイムスタンプフィールドがありません。他のデータビューを選択してください。",
     "xpack.observability.customThreshold.rule.alertFlyout.defineTextQueryPrompt": "クエリフィルターを定義（任意）",
     "xpack.observability.customThreshold.rule.alertFlyout.error.equation.invalidCharacters": "等式フィールドでは次の文字のみを使用できます：A-Z、+、-、/、*、(、)、?、!、&、:、|、>、<、=",
-    "xpack.observability.customThreshold.rule.alertFlyout.error.invalidFilterQuery": "フィルタークエリは無効です。",
     "xpack.observability.customThreshold.rule.alertFlyout.error.invalidSearchConfiguration": "データビューが必要です。",
     "xpack.observability.customThreshold.rule.alertFlyout.error.metrics.aggTypeRequired": "集約が必要です",
     "xpack.observability.customThreshold.rule.alertFlyout.error.metrics.fieldRequired": "フィールドが必要です",
diff --git a/x-pack/plugins/translations/translations/zh-CN.json b/x-pack/plugins/translations/translations/zh-CN.json
index 968bb911a2b0c..bd37c0d9f3fb6 100644
--- a/x-pack/plugins/translations/translations/zh-CN.json
+++ b/x-pack/plugins/translations/translations/zh-CN.json
@@ -28642,7 +28642,6 @@
     "xpack.observability.customThreshold.rule.alertFlyout.dataViewError.noTimestamp": "选定数据视图没有时间戳字段，请选择其他数据视图。",
     "xpack.observability.customThreshold.rule.alertFlyout.defineTextQueryPrompt": "定义查询筛选（可选）",
     "xpack.observability.customThreshold.rule.alertFlyout.error.equation.invalidCharacters": "方程字段仅支持以下字符：A-Z、+、-、/、*、(、)、?、!、&、:、|、>、<、=",
-    "xpack.observability.customThreshold.rule.alertFlyout.error.invalidFilterQuery": "筛选查询无效。",
     "xpack.observability.customThreshold.rule.alertFlyout.error.invalidSearchConfiguration": "需要数据视图。",
     "xpack.observability.customThreshold.rule.alertFlyout.error.metrics.aggTypeRequired": "“聚合”必填",
     "xpack.observability.customThreshold.rule.alertFlyout.error.metrics.fieldRequired": "“字段”必填",