What does it mean when all the warning lights on a car come on?
2 Answers
The reasons why all the warning lights on a car come on: 1. It may be due to an ECU CAN bus fault or poor contact at the ECU CAN interface; 2. Excessive dirt and carbon deposits, abnormal air circulation, and inability to accurately regulate the normal intake air volume, affecting unstable gas content and preventing the engine from working properly; 3. Low fuel pressure combined with poor constant pressure performance affects the system's atomization level, making the car difficult to start. The car dashboard is a device that reflects the working conditions of various vehicle systems. Different cars have slightly different dashboards, but most conventional dashboards include a speedometer, tachometer, engine oil pressure gauge, water temperature gauge, fuel gauge, and charging gauge.
A few days ago, I also experienced a situation where all the warning lights on the dashboard suddenly lit up. I immediately pulled over to check and found it was caused by unstable battery voltage. This issue is quite common, mainly due to problems with the alternator or battery. A loose or slipping alternator belt can cause abnormal power supply, while an aging battery with unstable voltage can trigger false alarms when the vehicle's computer receives incorrect signals. If all the lights come on right after starting the car, it's most likely due to a weak battery. Additionally, short circuits or blown fuses can also cause collective false alarms. A few friends of mine have even encountered issues with the vehicle's computer program malfunctioning. The safest approach is to stop the car immediately and avoid forcing it to drive. First, check if there are any specific error codes on the dashboard. Last time, I contacted the dealership for roadside assistance, and the technician used a diagnostic tool to read the codes, accurately identifying a faulty alternator voltage regulator.
