What does it mean when the bsmrcta light on the car is on?

2 Answers
Briana
09/04/25 4:40am
The bsmrcta light on the car indicates a malfunction in the lane change assist function, which is caused by a fault in the car's dual-clutch transmission. It is recommended to promptly visit the car's 4S store or a repair shop to inspect and repair the dual-clutch transmission. If the issue persists, it is advisable to have the lane change assist system checked. The following are the functions of the lane change assist system: Rear Vehicle Alert: When changing lanes, if there is a vehicle approaching from behind, the lane change assist system will alert the driver to ensure safe lane changing. The lane change assist is only a warning device and cannot assist in completing the lane change action. Eliminating Blind Spots: The lane change assist system alerts the driver to approaching vehicles from behind when changing lanes, eliminating blind spots and improving driving safety, which is particularly helpful for novice drivers. Adjacent Vehicle Alert: When signaling to change lanes, if the driver fails to notice other vehicles in adjacent lanes, the LED light on the rearview mirror will flash to warn the driver to pay attention to safety.
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Stephen
09/16/25 5:41am
I've been driving for over a decade, and that BSM/RCTA light usually indicates the activation of the Blind Spot Monitoring or Rear Cross Traffic Alert system. It means when you're driving or reversing, the system detects a vehicle approaching nearby and illuminates the light to alert you for safety. Common causes include normal system operation triggers or radar sensors being obscured by dust leading to inaccurate detection. I once encountered the light coming on unnecessarily during rainy weather, which turned out to be dirty sensors – a simple cleaning fixed it. It could also mean a system malfunction, in which case it's best to promptly check your vehicle manual to confirm the light's meaning. Don't stubbornly keep driving to avoid accidents. If truly uncertain, visit a professional repair shop – driving safety is paramount, never ignore these small indicator lights.
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