diff --git a/core/res/res/values/strings.xml b/core/res/res/values/strings.xml
index aad32b118b8f1..f0ba5ff2ecf48 100644
--- a/core/res/res/values/strings.xml
+++ b/core/res/res/values/strings.xml
@@ -1804,7 +1804,7 @@
     <!-- Message shown during face acquisition when the image is too bright [CHAR LIMIT=50] -->
     <string name="face_acquired_too_bright">Too bright. Try gentler lighting.</string>
     <!-- Message shown during face acquisition when the image is too dark [CHAR LIMIT=50] -->
-    <string name="face_acquired_too_dark">Try brighter lighting</string>
+    <string name="face_acquired_too_dark">Not enough light</string>
     <!-- Message shown during face acquisition when the user is too close to sensor [CHAR LIMIT=50] -->
     <string name="face_acquired_too_close">Move phone farther away</string>
     <!-- Message shown during face acquisition when the user is too far from sensor [CHAR LIMIT=50] -->
diff --git a/packages/SystemUI/res/values/config.xml b/packages/SystemUI/res/values/config.xml
index ec22c609b0b92..ae9ebbacea055 100644
--- a/packages/SystemUI/res/values/config.xml
+++ b/packages/SystemUI/res/values/config.xml
@@ -617,8 +617,9 @@
     <!-- Which face help messages to surface when fingerprint is also enrolled.
          Message ids correspond with the acquired ids in BiometricFaceConstants -->
     <integer-array name="config_face_help_msgs_when_fingerprint_enrolled">
-        <item>25</item>
-        <item>26</item>
+        <item>3</item> <!-- TOO_DARK -->
+        <item>25</item> <!-- DARK_GLASSES -->
+        <item>26</item> <!-- MOUTH_COVERING_DETECTED -->
     </integer-array>
 
     <!-- Whether the communal service should be enabled -->
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/KeyguardIndicationController.java b/packages/SystemUI/src/com/android/systemui/statusbar/KeyguardIndicationController.java
index 47dc5c2a5513e..03d4390be2906 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/KeyguardIndicationController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/KeyguardIndicationController.java
@@ -19,6 +19,7 @@ package com.android.systemui.statusbar;
 import static android.app.admin.DevicePolicyManager.DEVICE_OWNER_TYPE_FINANCED;
 import static android.app.admin.DevicePolicyResources.Strings.SystemUi.KEYGUARD_MANAGEMENT_DISCLOSURE;
 import static android.app.admin.DevicePolicyResources.Strings.SystemUi.KEYGUARD_NAMED_MANAGEMENT_DISCLOSURE;
+import static android.hardware.biometrics.BiometricFaceConstants.FACE_ACQUIRED_TOO_DARK;
 import static android.hardware.biometrics.BiometricSourceType.FACE;
 import static android.view.View.GONE;
 import static android.view.View.VISIBLE;
@@ -178,7 +179,7 @@ public class KeyguardIndicationController {
     private boolean mBatteryPresent = true;
     private long mChargingTimeRemaining;
     private String mBiometricErrorMessageToShowOnScreenOn;
-    private final Set<Integer> mCoExFaceHelpMsgIdsToShow;
+    private final Set<Integer> mCoExFaceAcquisitionMsgIdsToShow;
     private boolean mInited;
 
     private KeyguardUpdateMonitorCallback mUpdateMonitorCallback;
@@ -249,11 +250,11 @@ public class KeyguardIndicationController {
         mScreenLifecycle = screenLifecycle;
         mScreenLifecycle.addObserver(mScreenObserver);
 
-        mCoExFaceHelpMsgIdsToShow = new HashSet<>();
+        mCoExFaceAcquisitionMsgIdsToShow = new HashSet<>();
         int[] msgIds = context.getResources().getIntArray(
                 com.android.systemui.R.array.config_face_help_msgs_when_fingerprint_enrolled);
         for (int msgId : msgIds) {
-            mCoExFaceHelpMsgIdsToShow.add(msgId);
+            mCoExFaceAcquisitionMsgIdsToShow.add(msgId);
         }
 
         mHandler = new Handler(mainLooper) {
@@ -990,7 +991,7 @@ public class KeyguardIndicationController {
                 mTopIndicationView == null ? null : mTopIndicationView.getText()));
         pw.println("  computePowerIndication(): " + computePowerIndication());
         pw.println("  trustGrantedIndication: " + getTrustGrantedIndication());
-        pw.println("    mCoExFaceHelpMsgIdsToShow=" + mCoExFaceHelpMsgIdsToShow);
+        pw.println("    mCoExFaceHelpMsgIdsToShow=" + mCoExFaceAcquisitionMsgIdsToShow);
         mRotateTextViewController.dump(pw, args);
     }
 
@@ -1055,9 +1056,9 @@ public class KeyguardIndicationController {
             final boolean isUnlockWithFingerprintPossible =
                     mKeyguardUpdateMonitor.getCachedIsUnlockWithFingerprintPossible(
                             getCurrentUser());
-            if (faceAuthSoftError
-                    && isUnlockWithFingerprintPossible
-                    && !mCoExFaceHelpMsgIdsToShow.contains(msgId)) {
+            final boolean isCoExFaceAcquisitionMessage =
+                    faceAuthSoftError && isUnlockWithFingerprintPossible;
+            if (isCoExFaceAcquisitionMessage && !mCoExFaceAcquisitionMsgIdsToShow.contains(msgId)) {
                 if (DEBUG) {
                     Log.d(TAG, "skip showing msgId=" + msgId + " helpString=" + helpString
                             + ", due to co-ex logic");
@@ -1067,7 +1068,12 @@ public class KeyguardIndicationController {
                 mStatusBarKeyguardViewManager.showBouncerMessage(helpString,
                         mInitialTextColorState);
             } else if (mScreenLifecycle.getScreenState() == SCREEN_ON) {
-                if (faceAuthFailed && isUnlockWithFingerprintPossible) {
+                if (isCoExFaceAcquisitionMessage && msgId == FACE_ACQUIRED_TOO_DARK) {
+                    showBiometricMessage(
+                            helpString,
+                            mContext.getString(R.string.keyguard_suggest_fingerprint)
+                    );
+                } else if (faceAuthFailed && isUnlockWithFingerprintPossible) {
                     showBiometricMessage(
                             mContext.getString(R.string.keyguard_face_failed),
                             mContext.getString(R.string.keyguard_suggest_fingerprint)
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/KeyguardIndicationControllerTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/KeyguardIndicationControllerTest.java
index 798f47d2d6cbd..7623510f4bbc7 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/KeyguardIndicationControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/KeyguardIndicationControllerTest.java
@@ -667,7 +667,8 @@ public class KeyguardIndicationControllerTest extends SysuiTestCase {
         final String helpString = "helpString";
         final int[] msgIds = new int[]{
                 BiometricFaceConstants.FACE_ACQUIRED_MOUTH_COVERING_DETECTED,
-                BiometricFaceConstants.FACE_ACQUIRED_DARK_GLASSES_DETECTED
+                BiometricFaceConstants.FACE_ACQUIRED_DARK_GLASSES_DETECTED,
+                BiometricFaceConstants.FACE_ACQUIRED_TOO_DARK
         };
         Set<CharSequence> messages = new HashSet<>();
         for (int msgId : msgIds) {
@@ -698,8 +699,7 @@ public class KeyguardIndicationControllerTest extends SysuiTestCase {
                 BiometricFaceConstants.FACE_ACQUIRED_TOO_LEFT,
                 BiometricFaceConstants.FACE_ACQUIRED_TOO_HIGH,
                 BiometricFaceConstants.FACE_ACQUIRED_TOO_LOW,
-                BiometricFaceConstants.FACE_ACQUIRED_TOO_BRIGHT,
-                BiometricFaceConstants.FACE_ACQUIRED_TOO_DARK
+                BiometricFaceConstants.FACE_ACQUIRED_TOO_BRIGHT
         };
         for (int msgId : msgIds) {
             mKeyguardUpdateMonitorCallback.onBiometricHelp(
@@ -742,6 +742,28 @@ public class KeyguardIndicationControllerTest extends SysuiTestCase {
         verifyIndicationMessages(INDICATION_TYPE_BIOMETRIC_MESSAGE, helpStrings);
     }
 
+    @Test
+    public void sendTooDarkFaceHelpMessages_fingerprintEnrolled() {
+        createController();
+
+        // GIVEN fingerprint enrolled
+        when(mKeyguardUpdateMonitor.getCachedIsUnlockWithFingerprintPossible(
+                0)).thenReturn(true);
+
+        // WHEN help message received
+        final String helpString = "helpMsg";
+        mKeyguardUpdateMonitorCallback.onBiometricHelp(
+                BiometricFaceConstants.FACE_ACQUIRED_TOO_DARK,
+                helpString,
+                BiometricSourceType.FACE
+        );
+
+        // THEN help message shown and try fingerprint message shown
+        verifyIndicationMessage(INDICATION_TYPE_BIOMETRIC_MESSAGE, helpString);
+        verifyIndicationMessage(INDICATION_TYPE_BIOMETRIC_MESSAGE_FOLLOW_UP,
+                mContext.getString(R.string.keyguard_suggest_fingerprint));
+    }
+
     @Test
     public void updateMonitor_listenerUpdatesIndication() {
         createController();