What Causes the Failure of Volkswagen Throttle Control Function?
1 Answers
Volkswagen throttle control function failure is caused by a malfunction in the electronic throttle, which triggers the computer's fail-safe mode. In this state, the engine is no longer under the driver's control and operates at a predetermined speed based on the computer's memory. The electronic throttle is a critical control component of a car's engine. The electronic throttle control system ensures precise throttle opening control, improving fuel economy, reducing emissions, and delivering rapid system response for satisfactory driving performance. Additionally, it enables the integration of idle speed control, cruise control, and vehicle stability control, simplifying the control system structure. Common causes of electronic throttle failure include damaged position sensors, poor contact, open circuits, or short circuits in the throttle position sensor wiring, incorrect initialization position, leading to poor engine acceleration and weak vehicle performance. In automatic transmission vehicles, this may result in delayed gear shifts and harsh shifting. Excessive carbon buildup in the throttle, damage to the throttle servo motor, or poor contact, open circuits, or short circuits in the throttle servo motor wiring can cause symptoms such as engine idle shaking, unstable idle speed, stalling at low speeds, and poor throttle response. If the engine control unit malfunctions, the engine warning light will illuminate. All these issues require professional inspection and repair at a service center.
