A new light on your dashboard? You don’t find out why it doesn’t shut off… It’s typical, an automobile is elaborate and there are various motives why a light could come on. If your glow plug light comes on while driving your Toyota Prius, it may point out several issues. In this article, we will do anything we can to support you see things more clearly. First, we will find out how the preheating light on your Toyota Prius functions, and then the different explanations it lights up when you are driving

glow-plug-light-toyota-prius

What is the purpose of my Toyota Prius glow plug light?

The main role of the engine glow plug light, which is generally represented by a yellow coil, is to ensure that your glow plugs are working effectively. In reality, it must light up when you switch on your Toyota Prius to tell you that they are heating the intake air in your cylinders and must go out after a few minutes when the engine is running. This preheat light is therefore not supposed to stay or come on while driving with your car. However, if it comes on while driving, it may reveal different issues, we will try to describe the most important ones.

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

A glow light that comes on while driving on your Toyota Prius or at any other time other than when the engine is started is meant to warn you to a problem other than your spark plugs, we will look at this now. No matter the reason, plug in your car to the diagnostic tool will allow you to carefully understand the explanation for the light up of your glow light.

My Toyota Prius glow light comes on and I’m having a loss of power

The first probability is that you notice that your glow plug light comes on while driving your Toyota Prius and that you also knowledge a loss of power. In such a case, several trouble can explain its lightning. Here is a list of the most important motives:

  • Problem of EGR valve, indeed, if you go through a loss of power, it is possible that your EGR valve is blocked, in such a case, it is logical that your preheat light comes on while driving on Toyota Prius because it is one of the failures of which it is meant to notify you. Have the status of your valve examined
  • Issue associated with the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can result in turbo boost and a disturbance in the operation of the turbo.
  • Issue related to the injection, either an injector that has seized up or the injection pump that is broken by filings or other possible foreign bodies that affect its proper function.
  • Finally, the last problem that could lead to a glow indicator light on your Toyota Prius coupled with a loss of power, is that your fuel filter is too dirty, you should encounter 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 Prius

To conclude, we’ll give you the explanations for a glow plug light that comes on on your Toyota Prius without you feeling any difference in power or car behaviour. Generally, 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 get rid of the problem.
  • You have a false contact somewhere in your electrical circuit, test the other solutions first because it is not easy to find it alone, we suggest you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

    • If you have any additional questions about the Toyota Prius, do not hesitate to consult our Toyota Prius category.