[HemiByrd]

C codes, B codes, P codes, U codes

Format example:
P 0 1 0 1


1st letter
P = powertrain
B = Body
C = Chassis

1st digit
0 = Standard
1 = Manufacturer specific

2nd digit
1 = Emission management
2 = Injector circuit
3 = Ignition
4 = Auxiliary emission
5 = Vehicle speed & idle control
6 = Computer & output circuit
7 = Transmission

3rd and 4th digit are the specific trouble

 

[MrHemi]

Thanks Dave!

 

[Superjay]

 

[madcat]

excellent info Dave!