What is the reason why Jetta EPC light is on?

Regarding the lighting of epc lamp, the lighting of epc lamp is mainly caused by unclean throttle body. This situation can only be solved by cleaning the throttle and re-matching. Also, the failure of the brake light switch can also lead to this phenomenon. Then there is 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, this fault can also be caused, but the focus is on the carbon deposition in the throttle. You'd better go to a regular 4s shop and check it with a computer. I hope my answer is helpful to you.

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