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