diff --git a/pyren/mod_scan_ecus.py b/pyren/mod_scan_ecus.py
index dd8bcb2..91b43ec 100644
--- a/pyren/mod_scan_ecus.py
+++ b/pyren/mod_scan_ecus.py
@@ -655,7 +655,7 @@ class ScanEcus:
         
         if len( req )/2==3: rrsp = rrsp[3:]
       
-      if  int(row[base+3])*3+2<=len(rrsp):
+      if  int(row[base+3])*3+2 > len(rrsp):
         return False
         
       byte = int(rrsp[int(row[base+3])*3:int(row[base+3])*3+2],16)