Creator
OBDII/EOBD scanner
6
2) Which, if any, Diagnostic Trouble Codes
(DTCs) are stored;
3) Readiness Monitor status.
2.2 Diagnostic Trouble Codes (DTCs)
OBD II Diagnostic Trouble Codes are codes that
are stored by the on-board computer diagnostic
system in response to a problem found in the
vehicle. These codes identify a particular
problem area and are intended to provide you
with a guide as to where a fault might be
occurring within a vehicle. OBD II Diagnostic
Trouble
Codes
consist
of
a
five-digit
alphanumeric code. The first character, a
letter, identifies which control system sets
the code. The other four characters, all
numbers, provide additional information on
where the DTC originated and the operating
conditions that caused it to set. Here below
is an example to illustrate the structure of
the digits:
