diff --git a/libsigrokdecode4DSL/decoders/can/pd.py b/libsigrokdecode4DSL/decoders/can/pd.py
index 187e759f..8c501c77 100644
--- a/libsigrokdecode4DSL/decoders/can/pd.py
+++ b/libsigrokdecode4DSL/decoders/can/pd.py
@@ -21,6 +21,7 @@
 
 ##
 ##  2024/3/28 DreamSourceLab : Display data when zooming out 
+##  2024/6/18 DreamSourceLab : put error when stuff error
 ##
 
 from common.srdhelper import bitpack_msb
@@ -154,6 +155,8 @@ class Decoder(srd.Decoder):
         if len(self.bits) > self.last_databit + 17:
             return False
         last_6_bits = self.rawbits[-6:]
+        if last_6_bits in ([1, 1, 1, 1, 1, 1], [0, 0, 0, 0, 0, 0]):
+            self.putx([16, ['Stuff Error' ,'Error','E']])
         if last_6_bits not in ([0, 0, 0, 0, 0, 1], [1, 1, 1, 1, 1, 0]):
             return False