DTC stands for Diagnostic Trouble Codes, which report malfunctions to the vehicle. Using diagnostic devices, these error codes can be read in the error memory. With specialized equipment, error codes can be found even faster and more accurately, saving the customer’s money on unnecessary repairs.
The first part of the error code consists of a letter referring to the control system. The last 4 characters consist of numbers that provide additional information about the origin of the error code. Many DTC codes are standard and common to all car manufacturers.
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The first letter refers to the specific part of the car:
P: powertrain codes (motor)
C: chassis codes
B: body codes
U: network codes
The letter is followed by 4 digits, the first digit indicates whether it is a generic error (0) or a manufacturing error (1).
The last 3 digits contain the numbers 0 through 9 and A through. For P-codes, the error is defined by the first digit:
0, 1 and 2: air or fuel mixture
3: inflammatory system
4: emission control
5: stationary and speed
6: onboard computer and output
7, 8 and 9: control gearbox
A, B and C: hybrid drive
Especially for engine failures, DTC codes are important. In addition to universal codes, there are also manufacturer specific DTCs. These are:
P30xx t/m P33xx