Traction Control System (TCS) – What It Does Traction Control is a safety feature in modern cars designed to prevent wheel spin when you accelerate, especially on slippery surfaces like rain, snow, gravel, or ice. How It Works Your car has wheel-speed sensors (same as ABS). When the system detects that one wheel is spinning faster than the others (losing grip), it automatically: 1. Reduces engine power, and/or 2. Applies light braking to the spinning wheel This helps the tires regain traction so