Does poor contact of Jetta throttle harness necessarily lead to engine epc fault light?

EPC = electronic power control (full name of engine electronic stability system), which is also called electronic throttle by many people. EPC indicator lights are more common in the public. After the key door is opened, the vehicle starts self-inspection, and the EPC indicator light will light up for a few seconds and then go out. If the vehicle does not go out after starting, it means that the mechanical and electronic system of the vehicle has failed. Generally speaking, EPC lights have two possibilities. First, the throttle is dirty and needs cleaning. In another case, the brake light is not on, so it is necessary to check the brake switch and wiring. Also, due to the oil problem, the EPC fault light will also light up. The EPC light of Volkswagen shows that there is something wrong with the vehicle. It is recommended to go to the 4s shop for inspection as soon as possible.