What does vehicle VSS failure mean?

[Cardoso]

Vehicle VSS failure refers to a vehicle speed sensor malfunction, which causes abnormal speedometer indications. When the VSS (Vehicle Speed Sensor) fails, symptoms may include unstable engine idle, momentary stalling or engine shutdown during deceleration or stopping, reduced engine acceleration performance, inaccurate speed display on the dashboard, and illumination of the engine warning light. VSS additional information: 1. The function of the vehicle speed sensor is to transmit the vehicle's speed as an electrical signal to the electronic control unit (ECU), serving as a reference for controlling engine idle, automatic transmission shifting, torque converter lock-up, engine cooling fan operation, cruise control, and other functions. 2. The vehicle speed sensor is typically installed in the drive axle housing or transmission housing. Its signal wire is usually shielded to eliminate electromagnetic and radio frequency interference from high-voltage ignition wires, car phones, or other electronic devices, ensuring uninterrupted electronic communication and preventing degraded driving performance or other issues.