Free guide
Dashboard warning lights, explained
Pick a light to see what it means, how urgent it is, likely causes, and rough cost ranges. Red = stop soon. Amber = check soon.
Check Engine Light
Steady: get it checked soon. Flashing: stop driving as soon as it is safe.
Oil Pressure Warning Light
Urgent: pull over and shut off the engine.
Battery / Charging System Light
Serious: drive only to the nearest safe place or shop.
Engine Coolant Temperature Light
Red: urgent. Pull over and let the engine cool.
Tire Pressure (TPMS) Light
Check soon. Flashing then steady usually means a sensor fault.
ABS Warning Light
Get it checked soon.
Airbag (SRS) Warning Light
Get it checked soon.
Brake System Warning Light
Urgent if parking brake is off.
Traction / Stability Control Light
Flashing briefly = system working. Steady = fault or switched off.
Power Steering (EPS) Warning Light
Get it checked soon; steering may get very heavy.
Transmission Temperature Light
Pull over and let it cool.
Low Fuel Warning Light
Refuel soon.
Glow Plug Light (Diesel)
Normal briefly at startup. Flashing while driving = fault.
Diesel Particulate Filter (DPF) Light
Address soon to avoid costly clogging.
Service / Maintenance Required Light
Not urgent: a reminder.
Frequently asked questions
What do dashboard light colors mean?
Generally, red means a serious problem: stop safely as soon as possible. Amber or yellow means a fault to check soon. Green or blue lights are usually informational. Always check your owner's manual.
Can I drive with the check engine light on?
If it is steady and the car drives normally, usually yes for a short time, but get it scanned soon. If it is flashing, reduce speed and get it to a shop because a misfire can damage the catalytic converter.
Where can I get warning light codes read?
Many auto parts stores read engine codes for free, and any repair shop can scan your car. Inexpensive OBD-II scanners also work on most cars from 1996 and later.