Dashboard Warning Lights, Explained

Stop driving now

• Oil pressure (oil can symbol): pull over safely and shut the engine off. Driving on low oil pressure destroys engines quickly.
• Temperature gauge or coolant light: overheating warps expensive parts. Stop, let it cool, don't open a hot cap.
• Brake system warning: if the pedal also feels soft or long, stop driving and have it towed.
• Charging system / battery: you may have minutes of running time left. Head somewhere safe immediately.

Service soon, but you can drive

• Steady check engine light: something in the emissions or engine management system is out of range. Get the code read.
• ABS or traction control: normal braking still works, but the safety assist may not.
• Tire pressure (TPMS): check all four with a gauge — pressure drops in cold weather.
• Airbag light: the restraint system may not deploy. Not a wait-and-see item.

A flashing check engine light is different

Flashing usually indicates an active misfire, which can dump raw fuel into the catalytic converter and turn a moderate repair into an expensive one. Reduce load, avoid hard acceleration, and get it in right away.

Before you pay for diagnostics

Many parts stores read codes for free, and an inexpensive OBD-II reader pays for itself. A code isn't a diagnosis — it's a starting point — but walking in knowing the code makes the conversation with a shop much more productive.

Don't just clear the code

Clearing a code turns the light off without fixing anything, and it erases data a technician could have used. It will come back.