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RepairGuys Guidebook · Warning lights and leaks

Dashboard warning lights: which ones mean stop now

3 min readUpdated: · RepairGuys Service Center

Quick answer

The color usually tells you how urgent it is. Red generally means stop or get it checked right away: oil pressure, temperature, charging and brake warnings are red for a reason. Yellow or amber means something needs attention soon, like the check engine, ABS or tire pressure light. Green and blue lights are just information. Symbols vary by car, so your owner’s manual is the final word.

Red lights: stop or get it checked now

  • Oil pressure (oil can): the engine may not be getting oil. Pull over safely and turn the engine off. Driving on low oil pressure can destroy an engine in minutes.
  • Engine temperature (thermometer): the engine is overheating. Turn the A/C off and the heater to full hot, and pull over if it keeps climbing.
  • Battery or charging (battery symbol): the charging system isn’t charging and the car is running on the battery alone. Turn off what you can and head somewhere safe; the car may stall soon.
  • Brake (BRAKE or an exclamation mark in a circle): first make sure the parking brake is fully released. If the light stays on, brake fluid may be low or there may be a fault. If the pedal feels soft, don’t drive.
  • Airbag (a seated person with a circle): the airbags may not deploy in a crash. Get it checked soon.

Yellow or amber lights: get it checked soon

  • Check engine: a fault was found and stored. Solid means get it checked soon; flashing means a serious misfire, so ease off and get it checked right away.
  • ABS: the anti-lock system is off. Normal braking still works, but the wheels can lock in a hard stop, especially on wet or icy roads.
  • Tire pressure (horseshoe with an exclamation mark): one or more tires are low. Check all four. On many cars, if it flashes for about a minute and then stays on, the tire pressure system itself has a fault.
  • Traction or stability control (car with wavy lines): flashing while driving means it is working on a slippery road; staying on means the system is off or has a fault.
  • Power steering: steering may suddenly feel heavy. Drive carefully and get it checked.

Green and blue lights

These are information only: headlights, high beams, turn signals and cruise control. A blue high-beam light is a reminder to dim your lights for oncoming traffic.

If a light comes on and goes off again

Lights that come on briefly when you start the car are a normal self-check. A warning that comes and goes while driving still means the car detected something; note when it happened (speed, cold or warm engine, going over bumps) and tell the mechanic. It makes the diagnosis faster.

How we handle it here

  • We read the fault codes from every system the light belongs to, not just the engine, and test before recommending parts.
  • We explain what the light means for your car and give you the price before any work starts. Nothing is done without your approval.
  • We are open 24/7. If a red light comes on, pull over safely first, then call us.
  • We speak English and Spanish.

Sources

This guide is general information, not legal advice. Rules can change; check the official sources.