What causes the Jetta's EPC light to illuminate and result in no power?

[StJuliet]

The reasons for the Jetta's EPC light illuminating and resulting in no power are: 1. There is a leak in the intake system, causing the engine control unit to detect the issue and illuminate the EPC warning light; 2. Problems exist in the components or wiring of the engine's electronic throttle system; 3. The engine oil was not filled strictly according to standards, and excessive oil will affect the air-fuel mixture concentration, leading to abnormal illumination of the EPC light. It is recommended to inspect based on the above conditions, and regularly check for excessive engine carbon deposits every 20,000 to 30,000 kilometers, cleaning them in time. If inspections show no issues but the EPC warning light remains on, it is recommended to reset the engine control unit.