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Diagnostic Trouble Code
A five digit alphanumeric identifier for a fault condition identified
by the OBD II system. There are three types of DTCs:
1. Pending - When a fault condition
is identified during a Drive Cycle,
but does not meet enough
criteria to activate the MIL.
If the fault condition occurs during two
consecutive Drive Cycles, it will turn into
a Stored DTC and the MIL will activate.
2. Stored - A DTC is stored when a fault
condition has occurred that meets
enough criteria to activate the MIL.
3. Permanent - A stored DTC that can only
be cleared by the OBD II system, after
repairs are made, and a set number of
Driving Cycles have been completed.
Example: P0303 - Cylinder 3 Misfire
Systems
B - Body
C - Chassis
P - Powertrain
U - Network
Code Types*
0 - Generic
1 - Manufacturer Specific
2 - Generic Powertrain/Manufacturer Specific
3 - Generic Powertrain/Manufacturer Specific
Sub-Systems
1 - Fuel and Air Metering
2 - Fuel and Air Metering
(injector circuit malfunction only)
3 - Ignition Malfunction or Engine Misfire
4 - Auxiliary Emission Controls
5 - Vehicle Speed or Idle Controls
6 - Computer Output Circuits
7 - Transmission Controls
8 - Transmission Controls
03 - Cylinder 3
*The Scan Tool supports the following Code Types:
P 0 3 0 3
Generic (SAE):
P0, P2, P3, U0
Manufacturer Specific:
P1, P3, U0
Figure A
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