What does the throttle position sensor e2 mean?

VC stands for power supply 2, VTA 1 stands for detecting throttle opening 3, VTA2 stands for detecting fault of VTA 1, and E2 stands for fault code.

The throttle position sensor has two sensor circuits: VTA 1 and VTA2, and each circuit transmits a signal. VTA 1 is used to detect the throttle opening, and VTA2 is used to detect the fault of VTA 1. The sensor signal voltage varies from 0 to 5 volts in proportion to the throttle opening and is transmitted to terminals VTA 1 and VTA2 of the engine control module. When the throttle is closed, the output voltage of the sensor decreases, and when the throttle is opened, the output voltage of the sensor increases. The engine control module calculates the throttle opening according to these signals and controls the throttle actuator to respond to the driver's input. These signals are also used to calculate air-fuel ratio correction, power boost correction and fuel cut control.