Operation Manual

Diagnostic Trouble Code Breakdown
DTCs are composed of five characters; one letter followed by 4 digits.
Example DTCs:
Digit 1 = System Identifier
Digit 1 System
P Powertrain
B Body
C Chassis
U Undefined
 P0134
 P1155
 B0042
 C1132
 U3201
Digit 2 = Type of Code Definition
Generic:
Same definition for all manufacturers.
Manufacturer-Specific:
Definition varies among manufacturers.
Digit 2 Type of Code Definition
0 Generic
1 Manufacturer-Specific
2 P2xxx = Generic
B2xxx = Manufacturer-Specific
C2xxx = Manufacturer-Specific
U2xxx = Manufacturer-Specific
3 P30xx – P33xx = Manufacturer-Specific
P34xx – P39xx = Generic
B3xxx = Generic
C3xxx = Generic
U3xxx = Generic
Digit 3 = Sub-System
Digit
3
Sub-System
1 Fuel & Air Metering
2 Fuel & Air Metering
(Injector Circuit
Malfunction Only)
3 Ignition System or
Misfire
4 Auxiliary Emission
Control System
5 Vehicle Speed Control
& Idle Control System
6 Computer Output
Circuits
7-8 Transmission
Digits 4 & 5
The fourth and fifth digits of the DTC identify the specific problem.
31