diff --git a/src/usr/diag/prdf/common/plat/explorer/explorer_ocmb.rule b/src/usr/diag/prdf/common/plat/explorer/explorer_ocmb.rule
index c1e5c15a88e..e7baabc8204 100644
--- a/src/usr/diag/prdf/common/plat/explorer/explorer_ocmb.rule
+++ b/src/usr/diag/prdf/common/plat/explorer/explorer_ocmb.rule
@@ -5,7 +5,7 @@
 #
 # OpenPOWER HostBoot Project
 #
-# Contributors Listed Below - COPYRIGHT 2018,2019
+# Contributors Listed Below - COPYRIGHT 2018,2020
 # [+] International Business Machines Corp.
 #
 #
@@ -589,7 +589,7 @@ group gOCMB_LFIR
     /** OCMB_LFIR[38]
      *  DDR4 PHY interrupt
      */
-    (rOCMB_LFIR, bit(38)) ? ddr4_phy_interrupt;
+    (rOCMB_LFIR, bit(38)) ? defaultMaskedError;
 
     /** OCMB_LFIR[39:46]
      *  foxhound fatal
diff --git a/src/usr/diag/prdf/common/plat/explorer/explorer_ocmb_actions.rule b/src/usr/diag/prdf/common/plat/explorer/explorer_ocmb_actions.rule
index 1cd03de9f7c..0d0b900f014 100644
--- a/src/usr/diag/prdf/common/plat/explorer/explorer_ocmb_actions.rule
+++ b/src/usr/diag/prdf/common/plat/explorer/explorer_ocmb_actions.rule
@@ -261,14 +261,6 @@ actionclass TBDDefaultCallout
 #                                 OCMB Actions                                 #
 ################################################################################
 
-/** DDR4 PHY Interrupt */
-actionclass ddr4_phy_interrupt
-{
-    calloutSelfHigh;
-    threshold5pday;
-    funccall("Ddr4PhyInterrupt");
-};
-
 /** Foxhound Fatal */
 actionclass foxhound_fatal
 {
diff --git a/src/usr/diag/prdf/common/plat/explorer/prdfExplorerPlugins_common.C b/src/usr/diag/prdf/common/plat/explorer/prdfExplorerPlugins_common.C
index a8e9a5ebcf6..653ddb721a8 100644
--- a/src/usr/diag/prdf/common/plat/explorer/prdfExplorerPlugins_common.C
+++ b/src/usr/diag/prdf/common/plat/explorer/prdfExplorerPlugins_common.C
@@ -109,55 +109,6 @@ PRDF_PLUGIN_DEFINE( explorer_ocmb, PostAnalysis );
 //
 //##############################################################################
 
-/**
- * @brief  OCMB_LFIR[38] - DDR4 PHY interrupt
- * @param  i_chip An OCMB chip.
- * @param  io_sc  The step code data struct.
- * @return SUCCESS
- */
-int32_t Ddr4PhyInterrupt( ExtensibleChip * i_chip,
-                          STEP_CODE_DATA_STRUCT & io_sc )
-{
-    #define PRDF_FUNC "[explorer_ocmb::Ddr4PhyInterrupt] "
-
-    SCAN_COMM_REGISTER_CLASS * rdffir = i_chip->getRegister( "RDFFIR" );
-
-    // If Mainline UE (RDFFIR[14]) or Maint UE (RDFFIR[34]) are on at the same
-    // time as this:
-    if ( rdffir->IsBitSet(14) || rdffir->IsBitSet(34) )
-    {
-        // callout Explorer on 1st
-        io_sc.service_data->SetThresholdMaskId(0);
-
-        // mask maint and mainline UE which are assumed to be side-effects
-        SCAN_COMM_REGISTER_CLASS * rdffir_mask_or =
-            i_chip->getRegister( "RDFFIR_MASK_OR" );
-
-        rdffir_mask_or->SetBit(14);
-        rdffir_mask_or->SetBit(34);
-
-        if ( SUCCESS != rdffir_mask_or->Write() )
-        {
-            PRDF_ERR( PRDF_FUNC "Write() failed on RDFFIR_MASK_OR: 0x%08x",
-                      i_chip->getHuid() );
-        }
-    }
-    else
-    {
-        //TODO RTC 200583
-        // callout Explorer on threshold (5/day)
-        // NOTE: in this case we will have to clear both hw driven checkers
-        // manually before clearing the FIR
-    }
-
-    return SUCCESS;
-
-    #undef PRDF_FUNC
-}
-PRDF_PLUGIN_DEFINE( explorer_ocmb, Ddr4PhyInterrupt );
-
-//------------------------------------------------------------------------------
-
 /**
  * @brief  OCMB_LFIR[39:46] - Foxhound Fatal
  * @param  i_chip An OCMB chip.