diff --git a/core/api/current.txt b/core/api/current.txt
index a85c69b6284c5..644a194f6ed1e 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -42197,6 +42197,7 @@ package android.telephony {
     field public static final int IRAT_HANDOVER_FAILED = 2194; // 0x892
     field public static final int IS707B_MAX_ACCESS_PROBES = 2089; // 0x829
     field public static final int IWLAN_AUTHORIZATION_REJECTED = 9003; // 0x232b
+    field public static final int IWLAN_CONGESTION = 15500; // 0x3c8c
     field public static final int IWLAN_DNS_RESOLUTION_NAME_FAILURE = 16388; // 0x4004
     field public static final int IWLAN_DNS_RESOLUTION_TIMEOUT = 16389; // 0x4005
     field public static final int IWLAN_IKEV2_AUTH_FAILURE = 16385; // 0x4001
diff --git a/telephony/java/android/telephony/DataFailCause.java b/telephony/java/android/telephony/DataFailCause.java
index ac1f376cf6b54..5f7cfd109ec96 100644
--- a/telephony/java/android/telephony/DataFailCause.java
+++ b/telephony/java/android/telephony/DataFailCause.java
@@ -981,8 +981,15 @@ public final class DataFailCause {
     /** The ePDG does not support un-authenticated IMSI based emergency PDN bringup **/
     public static final int IWLAN_UNAUTHENTICATED_EMERGENCY_NOT_SUPPORTED = 0x2B2F;
 
-    // Device is unable to establish an IPSec tunnel with the ePDG for any reason
-    // e.g authentication fail or certificate validation or DNS Resolution and timeout failure.
+    // The below error causes are relevant when the device is unable to establish an IPSec tunnel
+    // with the ePDG for any reason, e.g. authentication fail or certificate validation or DNS
+    // Resolution and timeout failure.
+
+    /**
+     * The requested service was rejected because of congestion in the network while accessing the
+     * IWLAN ePDG. Defined in 3GPP TS 24.502, Section 9.2.4.2.
+     */
+    public static final int IWLAN_CONGESTION = 0x3C8C;
 
     /** IKE configuration error resulting in failure  */
     public static final int IWLAN_IKEV2_CONFIG_FAILURE = 0x4000;