There is an epc indicator light on the dashboard of Pu Sang automobile. What's wrong with the yellow light?

EPC light is mainly caused by dirty throttle body, which can be solved by re-matching after cleaning the throttle;

There is also a leak in the air intake system, which causes the engine control unit to light the EPC warning light after detecting the problem;

If there is a leak in the crankcase ventilation system, it will also lead to this failure;

Serious or obvious vacuum leakage is not a problem, only slight leakage can not be effectively detected by the control unit, and the compensation adjustment made by the control unit exceeds the limit allowed by the internal program of the control unit, and the control unit will judge that there is a problem with the electronic throttle system and the EPC fault light will be on;

However, the actual reason why the EPC light lights up in this process is not caused by the functional problems of the electronic throttle control system itself, and the failure of the brake light switch can also lead to this phenomenon.