Diagnostic Trouble Codes (Dtcs) - Launch Creader Elite 2.0 BBA Manual

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refers to much more gradual adjustments to the fuel calibration schedule than
short-term trim adjustments. These long-term adjustments compensate for
vehicle differences and gradual changes that occur over time.

1.4 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:
P0201 - Injector circuit malfunction, Cylinder 1
4