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FX Series Full System Scan Tool
6
provide you with a guide as to where a fault might be
occurring within a vehicle. OBD II Diagnostic Trouble
Codes consists of a five-digit alphanumeric 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. Here below
is an example to illustrate the structure of the digits:
Explanation of OBD2 Diagnostic Trouble Codes
X X X X X
Fault Description
1- Fuel & Air Metering
2- Fuel & Air Metering (Injector circuit)
3- Ignition System of Misfire
4- Auxiliary Emission Controls
5- Vehicle Speed Control & Idle Control System
6 - Computer Output Circuit
7,8,9- Transmission (Gearbox)
A,B.C- For Hybrid Propulsion
0- Generic OBD Code
1- Vehicle Manufacturer Specific Code
B- Body (Includes A/C & Air Bag)
C- Chassis (Includes ABS)
P- Powertrain (Engine & Transmission/Gearbox)
U- User Network (Wiring Bus/UART)
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