Diagnostic Trouble Codes (Dtcs); Trouble Code (Dtc) - Launch Creader V+ User Manual

LAUNCH Creader V+ User's Manual

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 second
character, a number, 0-3; other three characters, a hex character, 0-9 or A-F
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:
2