Many models of Toyota vehicles have a warning light that’s a yellow triangle containing an exclamation point. Toyota call it the master warning light and it comes on or flashes for a variety of reasons.
What Does Toyota Master Warning Light Mean?
The Toyota master warning light means the following:
- A message that’s available to read
- An incorrectly performed operation has been carried out
- The vehicle is in need of maintenance
- A minor or serious fault has been detected
The master warning light may also be accompanied by an additional warning light or an audible alert, but will always come on with a message describing what the problem is.
Although the master warning light does at first glance appear to be a serious problem, the warning light can come on simply due to a loose gas cap, a door not being properly closed or that there’s simply a message to read due to an operation that has not been correctly carried out by the driver. Toyota’s master warning light comes on for the following reasons:
|Warning light||Audible alert||Warning description|
|Master warning light comes on with audible alert
Both the master warning light (non-flashing) and audible alert indicates an important situation, for example; when a driving related system is malfunctioning or that danger may result if the correction procedure is not performed.
|Master warning light flashes with audible alert
A flashing master warning light and audible alert indicates an urgent situation that may result in damage to the vehicle or danger to passenger occupants. Generally a flashing master warning light and audible alert is considered the most urgent.
|Master warning light comes on, audible alert does not sound
The master warning light comes on (non-flashing) and the audible alert does not sound indicates a a possible malfunction of electrical components or the need for vehicle maintenance.
|Master warning light flashes, audible alert does not sound
Indicates a situation, such as when an operation has been performed incorrectly, or indicates how to perform an operation correctly.
What Should I Do if the Master Warning Light Comes On?
Toyota’s master warning light should always be accompanied by a message. Read the message and follow the instructions on the multi-information display. If after carrying out the instructions the warning light comes back on, contact a Toyota workshop.
Additionally, look to see if any other warning lights have come on along with the master warning light. You can find out more about your Toyota’s warning lights by looking in your vehicle owner’s manual or by selecting your vehicle in the Toyota dashboard warning lights section.