Vehicle would give off a warning light for the ABS system intermittently. While driving approximately at a speed of 55 mph, the light came on. The driver need to apply normal braking action for traffic. Vehicle pulled slightly to the right. Driver corrected, then vehicle went into an uncontrolled slide where rear of vehicle slid to left of driver until vehicle was turned 180 degrees opposite original direction, and proceeded to slide off hwy coming to rest in field. Vehicle stayed upright and incurred no obvious damage. Driver drove vehicle approx. 5-6 miles after that without incident and ABS light was out during that remaining time. Vehicle towed to repair shop. Repair technician ran codes from the vehicle computer and ascertained that both the the ABS module and speed sensor of rear wheel needed replacement. Original parts should be available for inspection.

- Albany, OR, USA