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DTCs are composed of five characters; one letter followed by 4 digits.
Example DTCs:
» P0134
» P1155
» B0042
» C1132
» U3201
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Digit 1 = System Identifier |
|
|
Digit 1 |
System |
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P |
Powertrain |
|
B |
Body |
|
C |
Chassis |
|
U |
Undefined |
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Digit 2 = Type of Code Definition Generic: Manufacturer-Specific: |
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Digit 2 |
Type of Code Definition |
|
0 |
Generic |
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1 |
Manufacturer-Specific |
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2 |
P2xxx = Generic B2xxx = Manufacturer-Specific C2xxx = Manufacturer-Specific U2xxx = Manufacturer-Specific |
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3 |
P30xx – P33xx = Manufacturer-Specific P34xx – P39xx = Generic B3xxx = Generic C3xxx = Generic U3xxx = Generic |
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Digit 3 = Sub-System |
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Digit 3 |
Sub-System |
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1 |
Fuel & Air Metering |
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2 |
Fuel & Air Metering (Injector Circuit Malfunction Only) |
|
3 |
Ignition System or Misfire |
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4 |
Auxiliary Emission Control System |
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5 |
Vehicle Speed Control & Idle Control System |
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6 |
Computer Output Circuits |
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7-8 |
Transmission |
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Digits 4 & 5 |
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The fourth and fifth digits of the DTC identify the specific problem. |