- What does the engine management light mean?It means the engine management system has spotted something wrong - not what the problem actually is.
- What does the tyre pressure warning light mean?One or more tyres is significantly under-pressure - it usually won't tell you which one.
- What does the oil pressure warning light mean?One of the more serious lights - it means the engine may not be getting properly lubricated.
- What does the battery warning light mean?The charging system (usually the alternator) isn't topping the battery up - the car is running on borrowed time.
- What does the brake warning light mean?Usually just the handbrake, but it can also mean low brake fluid or a genuine fault - worth checking which.
- What does the DPF warning light mean?The diesel particulate filter is clogging with soot - short journeys are the usual cause.
- What does the airbag warning light mean?A genuine safety-critical fault: the airbags may not deploy correctly in a crash while this is on.
- What does the coolant temperature warning light mean?The engine is overheating - continuing to drive risks serious, expensive damage.
- What does the ABS warning light mean?Normal braking still works, but you lose the anti-lock function that stops wheels skidding.
- What's the difference between a red, amber and green warning light?Red generally means stop and check now, amber means get it looked at soon, and green or blue is just information.
