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Creader Professional 129 EVO / EVO+
a warning lamp (MIL) on the vehicle instrument panel to alert the driver typically
by the phrase of "Check Engine" or "Service Engine Soon". The system will also
store important information about the detected malfunction so that a technician can
accurately find and fix the problem. Here below follow three pieces of such valuable
information:
1.
Whether the Malfunction Indicator Light (MIL) is commanded 'on' or 'off';
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,
sets the code. The second character,
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:
8
a letter, identifies which control system
a number, 0-3; other three characters, a hex
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