What does the yellow exclamation mark on the Corolla dashboard mean?

[DeMelanie]

There are four possible scenarios when a yellow exclamation mark appears on the car dashboard: general malfunction, automatic transmission failure, abnormal tire pressure, and lighting system failure. Below is a detailed analysis of these four situations: General malfunction: A triangle with an exclamation mark inside indicates a general performance or component/function failure in the vehicle. Common causes include parking sensor failure, fuel cutoff system intervention or malfunction, exterior light failure, or engine oil pressure sensor malfunction. It is recommended to visit a 4S shop for diagnosis and repair to identify the source of the problem. Automatic transmission failure: A yellow gear symbol with an exclamation mark inside is the automatic transmission warning light, indicating a transmission malfunction or that the transmission fluid level is below the normal range. The transmission fluid should be replaced promptly. Abnormal tire pressure: An exclamation mark inside a horizontal line under parentheses represents the tire pressure monitoring warning light. This light illuminates when the tire pressure is too low. Check the tire pressure and restore it to the normal range. Lighting system failure: A yellow bulb with an exclamation mark is the lighting failure indicator, signaling that a vehicle light has malfunctioned. Solution: Visit a 4S shop for inspection as soon as possible, or conduct a self-check focusing on commonly used bulbs such as turn signals, fog lights, and interior lights to identify the issue. Additionally, a red exclamation mark inside a circle with parentheses indicates a braking system warning, typically signaling a braking system malfunction or low brake fluid level. Immediate inspection and repair of the braking system are required to prevent accidents.