diff --git a/src/import/chips/p9/procedures/xml/error_info/p9_memory_mss_lib.xml b/src/import/chips/p9/procedures/xml/error_info/p9_memory_mss_lib.xml
index 9e4c29e8dca..1eaa9a8a309 100644
--- a/src/import/chips/p9/procedures/xml/error_info/p9_memory_mss_lib.xml
+++ b/src/import/chips/p9/procedures/xml/error_info/p9_memory_mss_lib.xml
@@ -491,4 +491,29 @@
     </callout>
   </hwpError>
 
+  <hwpError>
+    <rc>RC_MSS_C4_PIN_OUT_OF_RANGE</rc>
+    <description>Indicates a fail when attempting to get a PHY mapping for an out-of-bounds module C4 pin index</description>
+    <ffdc>MCA_TARGET</ffdc>
+    <ffdc>TYPE</ffdc>
+    <ffdc>INDEX</ffdc>
+    <callout>
+      <procedure>CODE</procedure>
+      <priority>HIGH</priority>
+    </callout>
+  </hwpError>
+
+  <hwpError>
+    <rc>RC_MSS_NO_C4_PIN_MAPPING</rc>
+    <description>Indicates a fail when attempting to get a module C4 pin mapping for a given PHY instance and lane</description>
+    <ffdc>MCA_TARGET</ffdc>
+    <ffdc>TYPE</ffdc>
+    <ffdc>DP</ffdc>
+    <ffdc>LANE</ffdc>
+    <callout>
+      <procedure>CODE</procedure>
+      <priority>HIGH</priority>
+    </callout>
+  </hwpError>
+
 </hwpErrors>