Will the check engine light on a Toyota Highlander come when coolant level is low?

No, the check engine light on a Toyota Highlander will not come on when the coolant level is low. The check engine light is designed to alert the driver of a potential problem with the engine or emissions system. Low coolant level is not a problem with the engine or emissions system, so the check engine light will not come on.

If the coolant level is low, it can cause a different warning light to come on. This warning light is typically a red or orange light with the image of a thermometer. If you see this warning light, it is important to check the coolant level and add coolant if necessary.

Low coolant level can lead to overheating, which can cause serious damage to the engine. Therefore, it is important to pay attention to the coolant level and add coolant if necessary.