Just 7% of UK drivers understand car warning lights says Temporary Car Insurance

Only 7% of UK drivers reportedly understand the meaning of car warning lights. 

To address this, the temporary car insurance specialists at Tempcover have created a guide highlighting the most common warning lights you should never ignore, as well as the warning lights Brits struggle with the most based on Google search data for their meanings.

The most confusing car warning light for Brits revealed

UK drivers are least familiar with these warning lights:

Rank

Car Warning Light

UK Searches (December 2024)

1

Engine Warning Light

6,600

2

ABS warning light

5,400

3

Oil Pressure Warning light

2,400

4

DPF warning light

1,900

5

Airbag Warning Light

1,600

• ECU / Engine Warning Light

This warning light confuses UK drivers the most, with over 6,600 searches in December. The colour of the light will often indicate the severity of the fault. A red light indicates a major issue, so stop the vehicle and call for breakdown assistance right away.

Tip: An amber light usually signifies an emissions issue. It’s generally safe to continue driving, but book an appointment with a mechanic when you reach your destination.

 ABS / Brake Fluid Warnings

The ABS warning light is the second most searched car warning light, with over 5,400 queries about its meaning. This light may indicate problems with the brake pads, sensors, or fluid levels, potentially leading to brake failure. Properly working brakes are vital for safe driving, so don’t ignore this signal.

Tip: Ensure your tyres are correctly inflated to aid in braking—a critical part of driving safety. Pull over as soon as the warning light appears and get in touch with a mechanic immediately.

Oil Pressure Warning

Ranking third with over 2,400 searches throughout Decemeber, this warning light signals potential issues ranging from low oil levels to engine faults. Ignoring it could result in severe engine damage, as insufficient oil or pressure problems can significantly harm your vehicle’s performance.

Tip: Should the light illuminate while you’re driving, pull over and stop as soon as possible. Call a mechanic or roadside assistance for help.

Diesel Particulate Filter (DPF) Warning Light

This warning light is the fourth most searched, with over 1,900 queries about its meaning. In diesel vehicles, soot can accumulate in the exhaust system, obstructing airflow. Most diesel engines feature a ‘regenerator’ that burns off the soot, but it only activates at specific speeds. Cold weather can hinder this process, making it crucial not to ignore the warning light.

Tip: In warmer weather, drive at a steady 40 mph or higher for about 10 minutes to prompt regeneration. However, in winter, it’s better to consult a mechanic rather than attempt this.

Airbag Warning Light

Ranking fifth, this warning light has garnered 1,600 searches in December. Its appearance typically indicates a problem with the airbag system or seatbelt mechanism. Common causes include a need to reset the airbag, wiring issues, or a battery-related fault.

Tip: When you see this light, either pull over immediately or carefully drive to the nearest garage. The airbags won’t deploy if this warning is active, which could be dangerous in a crash, so it’s best not to drive with this light on.