What does it mean when the car's A light is on?

[McVictoria]

When the car's A light is on, it indicates that the auto-hold system is activated. Characteristics of the auto-hold system activation: When this switch is turned on, even if the vehicle is stopped during driving and remains in the braking state, the vehicle will not continue moving. It will only resume driving when the accelerator is pressed again. Function of the auto-hold system: The auto-hold system refers to an automatic braking function. Once activated, for example, when stopping at a traffic light, it eliminates the need to use the handbrake or electronic parking brake, simplifying operations. For automatic transmission models, it also avoids frequent shifting between D to N or D to P.

[McJaxon]

Once the ABS light on my car suddenly came on, and I knew it meant there was an issue with the anti-lock braking system. Possible causes included the wheel speed sensors being covered in dirt or damaged, poor wiring harness connections, or a false alarm from the control computer. The ABS system is designed to prevent wheel lock-up during hard braking, and when the light is on, it means the car may have a longer stopping distance, which is especially dangerous in rainy or snowy conditions. I was terrified and immediately slowed down and pulled over. I first checked the fuse box to see if any fuses had blown—luckily, that wasn’t the issue this time. Later, I took it to a repair shop to scan the error codes, and it turned out the sensor was contaminated with oil. After cleaning it, the problem was resolved. I recommend not ignoring this little light—safety comes first. Delaying repairs can lead to reduced braking performance and increase the risk of accidents.

[LaJaxon]

When the ABS light comes on, you must be vigilant as it indicates the anti-lock braking system has failed. This system prevents wheel lock-up during hard braking, maintaining steering control. Once disabled, braking distance increases and skidding becomes more likely on slippery surfaces. When I encountered this, I first drove cautiously without speeding, then found a safe spot to pull over. A simple check is to restart the car – if the light remains on, it likely means a sensor or module is truly faulty. Avoid aggressive maneuvers as they increase rear-end collision risks. Prompt repairs can prevent major accidents – safety far outweighs saving on repair costs.

[StellaMarie]

The ABS warning light is an alert signal that illuminates when it detects abnormal data from the wheel speed sensors. This indicates an increased risk of wheel lock-up and unstable braking. Possible causes include dirty sensors, short circuits, or a faulty control unit. While it doesn't affect basic braking functionality, the loss of anti-lock braking may cause skidding. To accurately diagnose the issue, an OBD scanner should be used to read the fault codes.