What is the reason for the cruise control flashing and not maintaining speed?
2 Answers
The reason why the cruise control flashes and cannot maintain speed is that the cruise control cannot be turned on or fails during driving. The following are detailed explanations and solutions: Cruise control cannot be turned on: This is generally because the vehicle speed does not meet the limited conditions for cruise control activation. The speed must reach 40 kilometers per hour, so the cruise control cannot be activated. Simply increase the speed to 40 kilometers per hour. Failure during driving: If during driving, pressing the brake or clutch cannot stop the cruise control function, it may be a failure. This kind of failure can be minor or serious. If not handled properly, it may threaten life safety. The cause should be immediately investigated or the vehicle should be sent to a 4S shop for inspection.
I found that when the cruise control indicator light flashes but the speed cannot be set, the most common cause is a dirty or faulty vehicle speed sensor. I've experienced this myself while driving—the sensor is located near the wheels, and if it gets covered in mud or snow, it can't detect the wheel speed. The system then assumes the vehicle speed is unstable and prevents cruise mode from engaging. Additionally, the cruise control module might be overheating or have software issues, leading to incorrect signals. For newer cars, the ECU might need a reset. I recommend first cleaning the sensor, which is located on the inner side of the tire. Wipe it clean with a damp cloth and restart the engine; sometimes, this can resolve the issue. If the light continues to flash, it's best to scan for trouble codes using a diagnostic tool rather than forcing the system to work, as this could risk emergency braking or accidents. Regular maintenance of the sensor can prevent such issues—after all, safety comes first.
