diff --git a/.github/workflows/validate-ucm.yml b/.github/workflows/validate-ucm.yml
index fc06c3b..5eced67 100644
--- a/.github/workflows/validate-ucm.yml
+++ b/.github/workflows/validate-ucm.yml
@@ -3,6 +3,7 @@ name: Validate UCM
 on:
   push:
     branches: ["main"]
+  pull_request:
 
 jobs:
   validate:
diff --git a/validate-ucm.sh b/validate-ucm.sh
index 22c390e..3a60cba 100755
--- a/validate-ucm.sh
+++ b/validate-ucm.sh
@@ -1,7 +1,8 @@
 #!/bin/sh
 
 # Script to check each HiFi file for any keywords from the ChromeOS UCM
-# that should have been removed
+# that should have been removed, and also checks for any empty EnableSequence
+# and disable Sequence lines
 
 failed=0
 filtered_keywords=('cdev' 'FullySpecifiedUCM' 'DspName' 'sof' 'JackDev' 'JackSwitch' 'Line Out' 'CaptureChannelMap' 'IntrinsicSensitivity')
@@ -10,6 +11,9 @@ for keyword in "${filtered_keywords[@]}"; do
 	find -name "HiFi*.conf" -exec grep "${keyword}" {} + && failed=1
 done
 
+find -name "HiFi*.conf" -exec pcregrep -M  'EnableSequence \[(\n|.)\t\]' {} + && failed=1
+find -name "HiFi*.conf" -exec pcregrep -M  'DisableSequence \[(\n|.)\t\]' {} + && failed=1
+
 if [ $failed = 1 ]; then
 	echo "UCM validation failed"
 	exit 1