Oil change intervals generally range from 5,000 to 10,000 miles, with 7,500 miles being common for many modern vehicles using synthetic oil. Conventional oil typically requires changes every 3,000 to 5,000 miles. Always consult your owner's manual for specific recommendations based on driving habits, as severe conditions may require more frequent changes.  

The oil light (a red or yellow oil lamp icon) means your engine has low oil pressure or, less commonly, low oil levels. It indicates that engine parts are not receiving enough lubrication, which can cause severe, immediate damage or engine failure. Stop driving immediately and turn off the engine.  

A brake system warning light (usually a red "BRAKE" or "(!)" symbol) signifies a critical failure or severe safety risk, such as extremely low brake fluid, a malfunctioning master cylinder, or an engaged parking brake. It demands immediate attention to avoid potential brake failure.  

If your vehicle overheats, immediately turn off the air conditioning and turn the heater to maximum to help cool the engine. Safely pull over, turn off the engine, and wait at least 30 minutes before opening the hood. Never open the radiator cap while the engine is hot.  

A check engine light indicates that your car’s computer has detected a fault in the emissions, ignition, fuel, or transmission system. A solid light means a non-emergency, but requires prompt diagnosis; a flashing light indicates a serious misfire requiring immediate, safe stop-and-tow.  

A vehicle's battery light indicates a failure in the charging system, not necessarily a dead battery, meaning the car is running solely on battery power and will soon stall. Immediately turn off all non-essential electronics (AC, radio, heated seats) and drive to a safe location or mechanic without shutting off the engine. The car may stall and not restart.  

The airbag light (or SRS) indicates a critical fault in your vehicle’s airbag system, meaning airbags may not deploy during a crash or could deploy unexpectedly. Causes could include damaged sensors, faulty wiring, seat belt pretensioner issues, or a broken clockspring.  

When the TPMS light illuminates, it means at least one tire is significantly under-inflated. Safely pull over, check all tires with a gauge, and inflate them to the manufacturer’s recommended PSI (found on the driver's door placard). If the light stays on, it may require a reset by driving or you may need a tire repair.