What to Do When All Vehicle Warning Lights Are On?
2 Answers
Solutions for when all vehicle warning lights are on: 1. Check if there are any issues with the battery terminals, disconnect the negative terminal and reconnect it, then start the vehicle; 2. Measure the generator's output voltage; if it's around 14v, it indicates that the generator's output is not insufficient; 3. Use a diagnostic tool to check for any fault codes and narrow down the analysis based on the codes. Reasons for all vehicle warning lights being on: 1. CAN bus fault in the ECU or poor contact at the ECU's CAN interface; 2. Excessive dirt and carbon deposits causing abnormal air flow, leading to inaccurate control of normal air intake and unstable gas content, which affects engine performance; 3. Low fuel pressure combined with poor constant pressure performance results in low system atomization levels, making the vehicle difficult to start.
Yesterday, when I was driving my kid to school, I encountered this situation where all the warning lights suddenly lit up. Don't panic—the first thing to do is to slowly pull over and turn on the hazard lights. This is usually caused by a glitch in the car's computer or a dying battery. Last time, it happened to me because of a loose battery cable. Don't keep driving, especially on the highway—if the steering wheel locks up, it's a disaster. First, turn off the engine, wait ten minutes, and restart it; sometimes the system resets and the problem goes away. If the lights are still on, check the fuse box for any blown fuses—this is something you can replace yourself. If you really can't figure it out, call a tow truck—never attempt a long-distance drive with all the warning lights on. Many new cars have overly sensitive electronic systems; even a dirty wheel speed sensor can trigger false alarms.
