If the fault light stays off, there is no problem. In general, when the parameters of some sensors exceed the standard values, they will be recognized as fault-tolerant by ECU and the corresponding fault codes will be stored. If it is a qualitative fault decoder, it cannot be ruled out.

Automobile fault code is the fault code reflected by the analysis of automobile computer ECU after automobile fault occurs. Generally speaking, common fault codes are caused by faulty sensors.

Working principle:

Generally, the voltage working range of ECU is 6.5- 16V (internal key points have voltage stabilizing devices), the working current is 0.0 15-0. 1A, and the working temperature is -40℃~80℃.

It can withstand the vibration below 1000Hz, so the probability of ECU damage is very small. CPU is the core part of ECU, which has the functions of calculation and control. When the engine is running, the signals of various sensors are collected and calculated, and the calculation results are converted into control signals to control the work of the controlled object.