EV-specific warnings: tortoise or reduced-power mode, high-voltage system faults, 12 V battery warnings and charging alerts.
Looking for more detail? Our full guide covers this topic in depth, with step-by-step advice and sources.
Electric cars have fewer moving parts, but they add some warnings of their own. Symbols vary between makers, so check your handbook.
Reduced power (tortoise or turtle)
A tortoise symbol means power has been limited, usually because the battery charge is very low or the battery is too hot or too cold. Drive gently and charge as soon as possible.
High-voltage system fault
Often a car with an exclamation mark or a battery with a warning. Treat a red high-voltage warning seriously: stop when safe and call the maker's roadside assistance. Never try to work on high-voltage parts, usually marked with orange cables.
12 V battery warning
EVs still have a small 12 V battery that powers the computers and locks. If it fails, the car may not switch on even with a full main battery. Many EVs charge it automatically, but it can still wear out.
Charging alerts
Lights on the dashboard or at the charge port show charging status and faults. A charging fault may be the cable, the charger or the car; try another charger first.
Pedestrian warning sound
New EVs must make a sound at low speed so pedestrians can hear them. A warning about this acoustic vehicle alerting system (AVAS) should be fixed.
Shared warnings
EVs still use standard lights for brakes, ABS, airbags, tyre pressure and power steering, and the same MOT rules apply.
Sources and further reading
Facts checked on 20 October 2026. Spotted an error? Tell us and we will correct it.