Trailer sway control is an electronic technology in a tow vehicle that uses sensors to detect when a trailer begins to move from side to side while in forward motion. Then, the antilock braking system (ABS) and electronic stability control (ESC) engage to reduce or eliminate unwanted movement and slow the tow vehicle, keeping the trailer tracking.
When trailer sway control engages, the ESC light illuminates on the dash, signaling the driver to slow down as the technology stabilizes the trailer. Improper or uneven loading, towing at too high a speed, or heavy crosswinds can cause trailer sway. Pull over and check your trailer and connections after a trailer sway event. Adjust your load and start slowly before returning your trailer to highway speed.
See also: Trailer-Towing Technologies
