Automobile fault code

Among the fault codes, the "P" code starting with "0" is the code controlled by ISO standard (such as P0099), which is the same for all automobile manufacturers and is determined in advance by ISO/ASE.

①P0 100 series codes are related to fuel and air metering.

②P0200 series codes are also related to fuel and air metering.

③P0300 series codes are related to ignition system and misfire state.

④P0400 series codes are related to the auxiliary emission control system.

⑤P0500 series codes are related to vehicle speed, idle speed control system and auxiliary input.

⑥P0600 series codes are related to the internal fault of the control unit or the special circuit connecting the control unit and other control modules in the multi-channel communication system.

⑦P0700 series codes are related to gearbox control function.

⑧P0800 series codes are also related to transmission control function.

9. The last two digits of the code indicate a specific subsystem with its own diagnostic program. For example, P0 1 15 refers to the engine coolant temperature sensor.

Attending the last two digits of some P0200 and P0300 series codes are used to identify the specific engine cylinder where the fault is detected. For example, P0300 means multiple cylinders misfire, P030 1 means 1 cylinder misfire, P0302 means cylinder 2 misfire, and so on.