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5
LAUNCH Professional 919E User Manual
OBD II Diagnostic Trouble Codes consist of a ve-digit alphanumeric code.
• The 1st character is a letter (B, C, P or U). It identies the main system
where the fault occurred (Body, Chassis, Powertrain, or Network).
• The 2nd character is a numeric digit (0 thru 3). It identies the type of
code (Generic or Manufacturer-Specic).
Note: Generic DTCs are codes that are used by all vehicle manufacturers.
The standards for generic DTCs, as well as their definitions, are set by the
Society of Automotive Engineers (SAE).
Manufacturer-Specific DTCs are codes that are controlled by the vehicle
manufacturers. The Federal Government does not require vehicle manufacturers
to go beyond the standardized generic DTCs in order to comply with the new
OBD II emissions standards. However, manufacturers are free to expand
beyond the standardized codes to make their systems easier to diagnose.
• The 3rd character is a letter or a numeric digit (0 thru 9, A thru F). It
identies the specic system or sub-system where the problem is located.
• The 4th and 5th characters are letters or numeric digits (0 thru 9, A thru
F). They identify the section of the system that is malfunctioning.
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