What does FAW-Volkswagen fault code u111300 mean?
2 Answers
Fault code u111300 indicates that the ABS operation signal is out of tolerance. The following are the functions of ABS: 1. Prevent wheel lock-up: During vehicle braking, it automatically controls the braking force to prevent the wheels from locking up, keeping them in a state of rolling and sliding (with a slip rate of about 20%), ensuring maximum adhesion between the wheels and the ground. 2. Prevent loss of control during braking: The ABS anti-lock braking system prevents loss of steering control and wheel skidding during emergency braking, ensuring that the wheels do not lock up during braking. This prevents the tires from rubbing against the ground at a single point, thereby increasing friction and achieving braking efficiency of over 90%. It also reduces brake wear and extends the service life of brake drums, discs, and tires by up to twice as long.
I'm a seasoned Volkswagen mechanic with over a decade of experience, and I've encountered the U111300 fault code many times. This is actually a bus communication failure, commonly caused by wheel speed sensor signal loss or interference issues. Your dashboard ABS light will most likely illuminate, and you may experience sluggish acceleration or anti-lock braking failure while driving. You'll need professional diagnostic equipment to identify which specific sensor has gone offline or if there's water corrosion in the wiring connectors. Pay special attention to the wiring harness in the wheel arches during rainy seasons to prevent water immersion. For safety reasons, don't randomly unplug connectors yourself - promptly visit a reliable repair shop for computer diagnostics to determine the exact cause. If this happens on the highway, slow down and maintain steady control of the vehicle.
