What does it mean when the autohold yellow light stays on?
2 Answers
The reverse radar light only comes on when the car is in reverse gear, indicating that the reverse radar is active at that time. Here is some information about reverse radar: 1. Introduction: Reverse radar, also known as "reverse collision avoidance radar" or "parking assist device." 2. Components: It mainly consists of ultrasonic sensors, a controller, and a display. 3. Function: The reverse radar is a safety assist device for parking or reversing the car. It informs the driver about surrounding obstacles through sound or more intuitive displays, eliminating the troubles caused by the driver's need to look around when parking, reversing, or starting the vehicle, and helping the driver overcome blind spots and unclear vision.
Last time I also encountered the situation where the autohold yellow light stayed on constantly. After pondering for a while, I realized there could be several possible reasons. The most common one is that the vehicle didn't meet the activation conditions - in my case, it was because the door wasn't closed properly, so the system refused to work. Other minor issues like unfastened seatbelts or an unsecured trunk can also trigger the yellow warning light. Some models automatically disable this function when parked on steep slopes for safety reasons. The system will also illuminate the yellow light when the battery voltage is insufficient - I checked with a multimeter and indeed found the charge was low. Additionally, loose sensor connections or mud/water contamination can cause false alarms, requiring cleaning around the wheel speed sensor area. If you really can't identify the cause, it's best to visit a 4S shop for computer diagnostics. Their professional equipment can quickly pinpoint the faulty module, which is much more efficient than trying to figure it out yourself.
