A new light on your dashboard? You don’t find out why it doesn’t shut off… It’s typical, an auto is complicated and there are many reasons why a light might come on. If it turns out your glow plug light comes on while driving your Toyota Scion FR S, it may indicate different concerns. In the following paragraphs, we will do everything we can to help you see things more clearly. First, we will discover how the preheating light on your Toyota Scion FR S functions, and then the different explanations it lights up when you are driving

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What is the purpose of my Toyota Scion FR S glow plug light?

The main purpose of the engine glow plug light, which is most of the time represented by a yellow coil, is to ensure that your glow plugs are working effectively. Indeed, it must light up when you switch on your Toyota Scion FR S 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. Nevertheless, if it turns on while driving, it may indicate several failures, we will try to detail the main ones.

What to do if the glow plug light comes on while driving on my Toyota Scion FR S?

A glow light that comes on while driving on your Toyota Scion FR S or at any other time other than when the engine is started is designed to alert you to a fault other than your spark plugs, we will look at this right now. Whatever the case, 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 Scion FR S glow light comes on and I’m encountering a loss of power

The first possibility is that you notice that your glow plug light comes on while driving your Toyota Scion FR S and that you also knowledge a loss of power. In such a case, different concerns can demonstrate its presence. Here is a list of the main reasons:

  • Problem of EGR valve, in reality, if you suffer a loss of power, it is possible that your EGR valve is clogged, in this instance, it is rational that your preheat light comes on while driving on Toyota Scion FR S because it is one of the issue of which it is supposed to warn you. Have the status of your valve examined
  • Issue linked to 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 disturbance in the performance 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 disturb its proper functioning.
  • Finally, the last problem that could lead to a glow indicator light on your Toyota Scion FR S coupled with a loss of power, is that your fuel filter is too dirty, you should come to 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 Scion FR S

To finish , we’ll give you the explanations for a glow plug light that comes on on your Toyota Scion FR S without you feeling any difference in power or car behaviour. In general, this is an electronic fault:

  • Glow plug relays or fuses to be swapped out, test and change 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 fix the problem.
  • You have a false contact somewhere in your electrical circuit, test out the other solutions first because it is not easy to find it alone, we encourage you to go to your technician.
  • Faulty injection pressure sensor, ECU error

    • If perhaps you have any further questions about the Toyota Scion FR S, do not hesitate to consult our Toyota Scion FR S category.