DTC Format

DTC Format

A DTC is made up of 5 digits.

Example: P0101

1st digit B-Body
C-Chassis,
P-Powertrain
U-Network
2nd digit 0 Generic
1 Manufacturer specific
3rd digit 1 Air & Fuel Metering
2 Air & Fuel Metering (Injector Circuit)
3 Ignition System or Misfire
4 Auxiliary Emissions Controls
5 Vehicle Speed Controls And Idle Control System
6 Computer Output Circuit
7 Transmission
8 Transmission
4th & 5th digit Identifies what section of the system is malfunctioning