Understanding Your Dashboard Warning Lights: Essential Guide to Red, Amber, and Green Signals

In modern cars, dashboards are loaded with dials and a range of warning lights that can quickly activate, often leaving drivers puzzled.

Most of these lights are not a cause for immediate concern, as they usually switch off once the engine is running. However, if a warning light illuminates while driving, it’s essential to understand what it signifies, as some lights may point to serious issues that need urgent attention.

These lights are color-coded in red, orange/amber, and green, similar to a traffic light system. A red light signals “stop” and indicates a problem that requires immediate investigation. Orange or amber acts as a caution, suggesting that some action will soon be necessary. Meanwhile, green lights serve as reassuring reminders, letting drivers know that systems are functioning normally.

Here’s a helpful guide to the most common dashboard warning lights.

Red dashboard warning lights

Airbag warning light

This red icon, resembling a person holding a ball, indicates a potential malfunction with one of the airbags. This issue is critical, as it may result in the airbag failing to deploy in an accident or, conversely, deploying unexpectedly while driving.

Brake system light

If this light comes on, first check that the handbrake is fully released. If the light stays on, it could signal worn brake pads or discs, low brake fluid, or an issue with the ABS or ESP systems. Prompt inspection by a mechanic is advised.

Engine cooling system

This warning suggests low coolant levels or a blockage, which could lead to engine overheating. Seek immediate assistance from a breakdown service or head to the nearest garage.

Engine oil pressure

This light typically means the engine’s oil pressure is low, possibly indicating dangerously low oil levels. Pull over to a safe location, consult the vehicle’s manual, and check the oil level. If needed, top up with the specified oil type.

Power steering system

A warning about the power steering system can indicate that power assistance may fail, making steering difficult. Have the system inspected as soon as possible.

Vehicle charging system

A red battery icon often means the battery isn’t charging properly or is being drained when the car is off. Since this is a frequent reason for breakdowns, arrange an inspection if this light comes on.

Steering lock

If the steering lock light stays red after starting, it signals a malfunction in the locking mechanism. Avoid turning off the engine and head to a garage for inspection.

Ignition switch

This warning light could point to issues with the car’s ignition system. Have it checked by a mechanic to ensure smooth operation.

Orange/amber dashboard warning lights

Adaptive suspension dampers

This warning appears when the adaptive suspension needs servicing.

Air suspension

Indicates either that the air suspension is set to a raised position or a malfunction in the system.

Airbag warning light

An amber airbag light usually means the front passenger airbag has been turned off, such as when a child seat is placed in the front.

ABS

ABS allows safer braking while steering. This light means there’s a problem with the system, and a mechanic should inspect it.

AWD or 4WD

In cars with selectable all-wheel drive, this light confirms the chosen drive mode.

Brake pad monitoring

This light signals that the brake pads or discs need replacement soon.

Broken bulb

If a bulb is out, this symbol will appear, prompting you to replace it.

Child safety lock

This light confirms that the child safety lock is activated on the rear doors.

Convertible roof

Indicates an obstruction or issue with the roof mechanism.

Cruise control

Shows that cruise control is on.

DPF

For diesel cars, this light often means the DPF requires cleaning, which may involve a high-speed run. Persistent issues could affect emissions testing.