diff --git a/pyren/mod_ecu_default.py b/pyren/mod_ecu_default.py
index 8c02eb3..fb9ad13 100644
--- a/pyren/mod_ecu_default.py
+++ b/pyren/mod_ecu_default.py
@@ -56,10 +56,12 @@ def get_default_std_a( df, mn, se, elm, calc, getDTCmnemo ):
       hex_val = get_mnemonicDTC( mn[m], '57 01 '+ DTCs )
       comp = comp.replace(m, "0x"+hex_val) 
     isExists = calc.calculate(comp)
-    # if isExists==0: 		 #ignore error if it's definition does not exist
-    #   DTCs = DTCs[9:]
-    #   continue     
-        
+    
+    if not mod_globals.opt_minordtc:
+      if isExists==0: 		 #ignore error if it's definition does not exist
+        DTCs = DTCs[9:]
+        continue     
+          
     # Check if the default is alive
 
     infoPeriod = df[dtc].interpInfoPeri
@@ -76,16 +78,18 @@ def get_default_std_a( df, mn, se, elm, calc, getDTCmnemo ):
     
     # if the self.status eq 1 then default is alive
     # if the self.status eq 2 then default is memorised
-    # if df[dtc].status==0: 		     #ignore error if it's definition does not exist
-    #   DTCs = DTCs[9:]
-    #   continue 
+    if not mod_globals.opt_minordtc:
+      if df[dtc].status==0: 		     #ignore error if it's definition does not exist
+        DTCs = DTCs[9:]
+        continue 
           
     isAlive = ""
     if df[dtc].status==1: isAlive = mod_globals.language_dict['16882']  #ALIVE
     else:                 isAlive = mod_globals.language_dict['646']    #MEMORISED
-    # if df[dtc].status==0: 		     #ignore error if it's definition does not exist
-    #   DTCs = DTCs[9:]
-    #   continue        
+      if not mod_globals.opt_minordtc:
+        if df[dtc].status==0: 		     #ignore error if it's definition does not exist
+          DTCs = DTCs[9:]
+          continue        
     
     # Now get the interpretation
     
@@ -167,9 +171,10 @@ def get_default_std_b( df, mn, se, elm, calc, getDTCmnemo ):
       comp = comp.replace(m, "0x"+hex_val) 
     isExists = calc.calculate(comp)
     
-    # if isExists==0: 		 #ignore error if it's definition does not exist
-    #   DTCs = DTCs[12:]
-    #   continue     
+    if not mod_globals.opt_minordtc:
+      if isExists==0: 		 #ignore error if it's definition does not exist
+        DTCs = DTCs[12:]
+        continue     
         
     # Check if the default is alive
 
@@ -186,9 +191,10 @@ def get_default_std_b( df, mn, se, elm, calc, getDTCmnemo ):
     
     # if the self.status eq 1 then default is alive
     # if the self.status eq 2 then default is memorised
-    # if df[dtc].status==0:      #ignore error if it's definition does not exist
-    #   DTCs = DTCs[12:]
-    #   continue
+    if not mod_globals.opt_minordtc:
+      if df[dtc].status==0:      #ignore error if it's definition does not exist
+        DTCs = DTCs[12:]
+        continue
 
     isAlive = ""
     if df[dtc].status==1: isAlive = mod_globals.language_dict['16882']  #ALIVE
diff --git a/pyren/mod_globals.py b/pyren/mod_globals.py
index da6c8af..0456b28 100755
--- a/pyren/mod_globals.py
+++ b/pyren/mod_globals.py
@@ -35,7 +35,7 @@ opt_obdlink   = False    #basically, STN(PIC24) based ELM327
 opt_stn       = False    #STN(PIC24) ELM327 which has ability to automatically switch beetween two CAN lines
 opt_sd        = False    #separate doc files
 opt_perform   = False
-
+opt_minordtc  = False
 dumpName = ""
 
 state_scan    = False
diff --git a/pyren/mod_term.py b/pyren/mod_term.py
index 203c997..bf8c098 100755
--- a/pyren/mod_term.py
+++ b/pyren/mod_term.py
@@ -248,6 +248,11 @@ def optParser():
       default=False,
       action="store_true")
 
+  parser.add_argument("--minordtc",
+      help="use to show all DTCs without checking computation formula",
+      dest="minordtc",
+      default=False,
+      action="store_true")
 
   options = parser.parse_args()
   
@@ -270,6 +275,7 @@ def optParser():
     mod_globals.opt_si        = options.si
     mod_globals.opt_cfc0      = options.cfc
     mod_globals.opt_n1c       = options.n1c
+    mod_globals.opt_minordtc  = options.minordtc
     auto_dia                  = options.dia
     debug_mode                = options.dbg
 
diff --git a/pyren/pyren.py b/pyren/pyren.py
index 63592a2..159406e 100755
--- a/pyren/pyren.py
+++ b/pyren/pyren.py
@@ -202,6 +202,12 @@ def optParser():
       default=False,
       action="store_true")
 
+  parser.add_argument("--minordtc",
+      help="use to show all DTCs without checking computation formula",
+      dest="minordtc",
+      default=False,
+      action="store_true")
+
   options = parser.parse_args()
   
   if not options.port and mod_globals.os != 'android':
@@ -239,6 +245,7 @@ def optParser():
     mod_globals.opt_can2      = options.can2
     mod_globals.opt_perform   = options.perform
     mod_globals.opt_sd        = options.sd
+    mod_globals.opt_minordtc  = options.minordtc
     if options.dev=='' or len(options.dev)!=4 or options.dev[0:2]!='10':
       mod_globals.opt_dev       = False
       mod_globals.opt_devses    = '1086'