Numbering of OBD2 errors:
P 1 0 2 2
| CHAR 1 | SYMBOL 2 | SYMBOL 3 | CHARACTERS 4 AND 5 |
| B - body | 0 - Generic (SAE) | Control unit system or function | Error code number |
| C - chassis | 1 - Factory (OEM) | ||
| P - engine / gearbox | 2 - Factory (OEM) | ||
| U - interunit data bus | 3 - Reserve |
Reading OBD-II codes:
First position:
P - is for powertrain codes - the code is associated with the operation of the engine and / or automatic transmission
B - is for body codes - the code is associated with the operation of "body systems" (airbags, central locking, power windows)
C - is for chassis codes - the code refers to the chassis system (chassis)
U - is for network codes - the code refers to the system of interaction between electronic units (for example, to the CAN bus)
Second position :
0 - common for OBD-II code
1 and 2 - manufacturer code
3 - reserve
Third position - type of fault:
1 - fuel system or air supply
2 - fuel system or air supply
3 - ignition system
4 - auxiliary control
- idle
6 - ECU or its circuits
7 - transmission
8 - transmission
The fourth and fifth positions are the serial number of the error