A new warning light on your dashboard? You don’t understand why it doesn’t switch off… It’s normal, a car is elaborate and there are multiple causes why a light might occur. In the event that your glow plug light comes on while driving your Toyota Yaris 2, it may possibly indicate different concerns. On this page, we will do everything we can to support you see things more clearly. First, we will discover how the preheating light on your Toyota Yaris 2 functions, and then the different causes it lights up when you are driving

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What is the goal of my Toyota Yaris 2 glow plug light?

The primary role of the engine glow plug light, which is in most cases symbolized by a yellow coil, is to ensure that your glow plugs are working effectively. In fact, it must light up when you switch on your Toyota Yaris 2 to tell you that they are heating the intake air in your cylinders and must go out after a few moments when the engine is running. This preheat light is therefore not supposed to stay or come on while driving with your motor vehicle. However, if it turns on while driving, it may indicate different failures, we will try to explain the main ones.

What to do if the glow plug light comes on while driving on my Toyota Yaris 2?

A glow light that comes on while driving on your Toyota Yaris 2 or at any other time other than when the engine is started is designed to warn you to a problem other than your spark plugs, we will take a look at this right now. No matter the reason, plug in your car to the diagnostic tool will allow you to properly translate the cause for the light up of your glow light.

My Toyota Yaris 2 glow light comes on and I’m experiencing a loss of power

The first situation is that you perceive that your glow plug light comes on while driving your Toyota Yaris 2 and that you also encounter a loss of power. In such a case, different complications can describe its presence. Here is a list of the main causes:

  • Issue of EGR valve, in fact, if you undergo a loss of power, it is possible that your EGR valve is blocked, in this case, it is logical that your preheat light comes on while driving on Toyota Yaris 2 because it is one of the issue of which it is designed to warn you. Have the status of your valve looked at
  • Problem associated with the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can bring about turbo boost and a perturbation in the operation of the turbo.
  • Problem related to the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that affect its proper performing.
  • Finally, the last trouble that could lead to a glow indicator light on your Toyota Yaris 2 coupled with a loss of power, is that your fuel filter is too dirty, you should feel jerks because of a bad fuel flow in the engine.

My glow plug light comes on or is flashing but no difference on the performance of my Toyota Yaris 2

Finally, we’ll give you the causes for a glow plug light that comes on on your Toyota Yaris 2 without you feeling any difference in power or motor vehicle behaviour. In general, this is an electronic problem:

  • Glow plug relays or fuses to be changed, test and replace if necessary.
  • A contactor/potentiometer on one of your pedals (brake, accelerator or clutch) has failed, often a simple de-seizure will be enough to resolve the trouble.
  • You have a false contact somewhere in your electrical circuit, check the other alternatives first because it is not easy to find it alone, we encourage you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

    • In the event that you have any further questions about the Toyota Yaris 2, do not hesitate to consult our Toyota Yaris 2 category.