diff --git a/selfdrive/debug/clear_dtc.py b/selfdrive/debug/clear_dtc.py
index f4d38367b1..d84828079d 100755
--- a/selfdrive/debug/clear_dtc.py
+++ b/selfdrive/debug/clear_dtc.py
@@ -1,9 +1,16 @@
 #!/usr/bin/env python3
 import sys
+import argparse
 from subprocess import check_output, CalledProcessError
 from panda import Panda
 from panda.python.uds import UdsClient, MessageTimeoutError, SESSION_TYPE, DTC_GROUP_TYPE
 
+parser = argparse.ArgumentParser(description="clear DTC status")
+parser.add_argument("addr", type=lambda x: int(x,0), nargs="?", default=0x7DF) # default is functional (broadcast) address
+parser.add_argument("--bus", type=int, default=0)
+parser.add_argument('--debug', action='store_true')
+args = parser.parse_args()
+
 try:
   check_output(["pidof", "boardd"])
   print("boardd is running, please kill openpilot before running this script! (aborted)")
@@ -14,17 +21,20 @@ except CalledProcessError as e:
 
 panda = Panda()
 panda.set_safety_mode(Panda.SAFETY_ELM327)
-address = 0x7DF # functional (broadcast) address
-uds_client = UdsClient(panda, address, bus=0, debug=False)
+uds_client = UdsClient(panda, args.addr, bus=args.bus, debug=args.debug)
 print("extended diagnostic session ...")
 try:
   uds_client.diagnostic_session_control(SESSION_TYPE.EXTENDED_DIAGNOSTIC)
 except MessageTimeoutError:
-  pass # functional address isn't properly handled so a timeout occurs
+  # functional address isn't properly handled so a timeout occurs
+  if args.addr != 0x7DF:
+    raise
 print("clear diagnostic info ...")
 try:
   uds_client.clear_diagnostic_information(DTC_GROUP_TYPE.ALL)
 except MessageTimeoutError:
-  pass # functional address isn't properly handled so a timeout occurs
+  # functional address isn't properly handled so a timeout occurs
+  if args.addr != 0x7DF:
+    pass 
 print("")
 print("you may need to power cycle your vehicle now")
diff --git a/selfdrive/debug/read_dtc_status.py b/selfdrive/debug/read_dtc_status.py
new file mode 100755
index 0000000000..9ad5563975
--- /dev/null
+++ b/selfdrive/debug/read_dtc_status.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+import sys
+import argparse
+from subprocess import check_output, CalledProcessError
+from panda import Panda
+from panda.python.uds import UdsClient, SESSION_TYPE, DTC_REPORT_TYPE, DTC_STATUS_MASK_TYPE
+from panda.python.uds import get_dtc_num_as_str, get_dtc_status_names
+
+parser = argparse.ArgumentParser(description="read DTC status")
+parser.add_argument("addr", type=lambda x: int(x,0))
+parser.add_argument("--bus", type=int, default=0)
+parser.add_argument('--debug', action='store_true')
+args = parser.parse_args()
+
+try:
+  check_output(["pidof", "boardd"])
+  print("boardd is running, please kill openpilot before running this script! (aborted)")
+  sys.exit(1)
+except CalledProcessError as e:
+  if e.returncode != 1: # 1 == no process found (boardd not running)
+    raise e
+
+panda = Panda()
+panda.set_safety_mode(Panda.SAFETY_ELM327)
+uds_client = UdsClient(panda, args.addr, bus=args.bus, debug=args.debug)
+print("extended diagnostic session ...")
+uds_client.diagnostic_session_control(SESSION_TYPE.EXTENDED_DIAGNOSTIC)
+print("read diagnostic codes ...")
+data = uds_client.read_dtc_information(DTC_REPORT_TYPE.DTC_BY_STATUS_MASK, DTC_STATUS_MASK_TYPE.ALL)
+print("status availability:", " ".join(get_dtc_status_names(data[0])))
+print("DTC status:")
+for i in range(1, len(data), 4):
+  dtc_num = get_dtc_num_as_str(data[i:i+3])
+  dtc_status = " ".join(get_dtc_status_names(data[i+3]))
+  print(dtc_num, dtc_status)