What Causes All the Warning Lights in a Car to Illuminate?

[DiGenesis]

There are several reasons why all the warning lights in a car may illuminate: 1. CAN bus failure in the ECU, or poor contact at the ECU's CAN interface. 2. Excessive dirt and carbon deposits, causing abnormal air flow and preventing accurate control of the normal air intake, leading to unstable gas content and poor engine performance. 3. Low fuel pressure combined with poor constant pressure performance results in low system atomization levels, making the car difficult to start. 4. If all dashboard lights remain illuminated after the vehicle starts, it could be due to dashboard wiring faults, engine failure, transmission failure, brake system failure, coolant temperature issues, etc.