Startax 1701-0046, User Instructions, Page: 28 / 40

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2.2 Diagnostic Trouble Codes (DTCs)
OBDII Diagnostic Trouble Codes are stored by the on-board computer diag-
nostic 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. OBDII diag-
nostic trouble codes consist of a five-digit code. The first character, a letter,
identifies which control system sets the code. The other four characters, all
numbers, provide additional information on where the DTC originated and
the operating conditions that caused it to set.
1 2 3 4
1 Systems
B = Body
C = Chassis
P = Powertrain
U = Network
2 Code Type Generic (SAE):
P0
B0
C0
U0
Manufacturer Specific:
P1, P2
B1, B2
C1, C2
3 Sub-systems
1 = Fuel and air metering
2 = Ignition system or engine misfire
3 = Auxiliary emissions controls
4 = Vehic le speed control and idle cont
5 = Computer output circuits
6 = Transmission controls
4 Last two digits identify individual
component within the system
Explanation of a diagnostic trouble code.