What do red warning lights mean?

Red warning lights usually indicate a serious issue requiring immediate attention. You should stop the car safely and investigate.

Can you drive with an amber warning light?

Amber lights often indicate a problem that needs attention soon. You can usually drive carefully, but it should be checked.

Oil pressure, brake system, overheating and battery warning lights are among the most serious and may require stopping immediately.

Red warning lights usually mean stop immediately. Amber lights mean check soon. Green or blue lights are informational.

Serious fault. Stop safely as soon as possible.

Problem detected. Drive carefully and check soon.

Information only. No fault.

Indicates an engine or emissions fault.

Low oil pressure — stop immediately.

Charging system problem.

Brake system fault or low fluid.

ABS system fault.

Low tyre pressure or TPMS issue.

Loss of traction or system fault.

Diesel emissions filter issue.

Some warning lights can cause MOT failure if they indicate a fault with monitored systems.

Oil pressure and brake warning lights are among the most serious.

No. Even minor warnings can become serious if ignored.

It could be a sensor fault, wear issue or sudden mechanical problem.