Diagnostic Trouble Codes (DTCs)
DTCs are created and stored by the vehicles on-board computer in response to a problem
detected.
• The codes identify a particular problem and indicate where the fault has occurred.
• The first character identifies which control system set the code.
• The following four numbers, indicate where the problem originated and the conditions
that caused it to set.
Below is an example to illustrate the structure of the digits:
DTC Example
P 0 2 0 1
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