What are the reasons for intermittent cruise control issues?
2 Answers
It may be caused by cruise control malfunction. Troubleshooting method: Activate cruise control, the dashboard prompts "Please check cruise control", the warning light doesn't illuminate. After turning off and restarting the engine, it works again temporarily. After several repeated tests, the problem comes and goes intermittently. Computer diagnostics revealed faults in the brake pump and hybrid system. After clearing the error codes, the issue was resolved. Introduction to cruise control: Abbreviated as CCS, also known as cruise control device, speed control system, or autonomous driving system. Its function is to automatically maintain the vehicle speed as set by the driver without requiring constant throttle pedal input, allowing the vehicle to travel at a constant speed. Basic functions: When the cruise control button is pressed, the vehicle maintains the set speed. The function is immediately canceled when the brake pedal is depressed. In addition to using the brake pedal to cancel the function, other cancelation methods include using the parking brake, clutch (M/T), or shift lever (A/T).
I often encounter issues with my cruise control working intermittently while driving, which is quite annoying. It's usually caused by loose connections in the electronic control unit or sensors, such as the wheel speed sensor getting dusty or having poor contact, leading to inaccurate speed signal readings and cruise control failure. Aging circuit wiring can also cause unstable power supply, especially in older cars where oxidized wire connectors cause erratic current flow. Once during a long trip, my cruise control suddenly failed, and I had to pull over in a panic to check. I found that the connector to the ECU had come loose. Such faults are dangerous—imagine losing control on the highway! That's why it's important to have a reliable repair shop inspect the entire wiring system, not just replace parts as a quick fix. Regular maintenance, like cleaning around sensors to reduce dirt interference, can help prevent minor issues.
