What Causes the Sudden Increase in Idle Speed When Braking?

[LeCourtney]

Automatic transmission vehicles may experience a sudden increase in idle speed when braking due to a dirty throttle position sensor or sensor connector, which causes signal distortion. This leads the ECU to remain in idle mode without adjusting to the target speed. Braking serves to reduce vehicle speed, and the following precautions should be noted: 1. Note 1: Apply the brake gently when following other vehicles. 2. Note 2: Use emergency braking cautiously in rainy conditions. 3. Note 3: Avoid using emergency braking on slopes and curves. Solutions for brake failure include: 1. Solution 1: Release the accelerator pedal. 2. Solution 2: Shift to manual mode and manually downshift from higher to lower gears. 3. Solution 3: When pulling the handbrake, press the release button and pull the handbrake in a series of short motions without locking it. 4. Solution 4: After the vehicle stops, shift into park.