My AutoPlace

Low coolant light: what it means and what to do

Thermometer in waves with a level line, or a coolant bottle symbol.

Book this weekSafe to keep driving for now, but get it checked this week.

The coolant level in the car is low. Running low can lead to overheating. Top it up only when the engine is cold, and have a shop find out where it has gone.

What it means

Coolant keeps the engine at the right temperature. It rarely disappears without a reason, so a low level often means a small leak, a worn hose or a failing water pump.

Can I keep driving?

Only a short way, and watch the temperature. Stop if it climbs.

What to do now

  1. Park, switch off and let the engine cool fully before opening anything.
  2. Check the coolant level in the overflow bottle and top up with the type in your handbook.
  3. Book a leak check. If the temperature gauge climbs, stop and call for help.

Common causes

  • A slow coolant leak
  • A worn hose or loose clamp
  • A failing water pump or radiator
  • A faulty level sensor

Shops near you that can check this

Closest first. Your location stays on your phone.

Car Lab

Auckland CBD

Mechanics · WOF stations

Free written quote, or call to book

CallSee shop

M Tech

Henderson

Mechanics

Free written quote, or call to book

See shop

AZ Autos

Papatoetoe

Mechanics · WOF stations

Free written quote, or call to book

See shop

AB Autos

Panmure

Mechanics · WOF stations

Free written quote, or call to book

See shop

Fredco

Kingsland

Mechanics · WOF stations

Free written quote, or call to book

CallSee shop

VIRLTD

Onehunga

Mechanics · WOF stations

Free written quote, or call to book

CallSee shop

See all mechanics in this suburb

Questions drivers ask

Can I drive with the low coolant light on?

Only a short way, and watch the temperature. Stop if it climbs.

What does the low coolant light mean?

The coolant level in the car is low. Running low can lead to overheating. Top it up only when the engine is cold, and have a shop find out where it has gone.

What should I do when the low coolant light comes on?

Park, switch off and let the engine cool fully before opening anything. Check the coolant level in the overflow bottle and top up with the type in your handbook. Book a leak check. If the temperature gauge climbs, stop and call for help.

Need a tow? Call now

If anyone is hurt or you're in danger, call 111 first. Get off the road and wait behind the barrier.

Call AA Roadservice 0800 500 222

Members and non-members can call. Have your location and rego ready.

Other numbers to try

  • Your insurer's roadside line. Many policies include a free tow, and it's on your policy card or app.
  • Your car maker's roadside assistance, if the car is new enough.
  • A local tow company. Search "tow truck" with your suburb, and ask the price before you agree.

Need it fixed after? Find a shop near you and call them.

Book

What for?

Free to book. The shop texts to confirm, and gives you a written quote before any work.