A new warning light on your dashboard? You don’t find out why it doesn’t turn off… It’s typical, an automobile is complex and there are multiple reasons why a light might come on. In the event that your glow plug light comes on while driving your Toyota Yaris, it might show different things. In the following paragraphs, we will do everything we can to support you see things more clearly. First, we will see how the preheating light on your Toyota Yaris works, and then the different explanations it lights up when you are driving

glow-plug-light-toyota-yaris

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

The primary purpose of the engine glow plug light, which is in most cases represented by a yellow coil, is to assure that your glow plugs are working properly. In reality, it must light up when you switch on your Toyota Yaris 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 expected to stay or come on while driving with your motor vehicle. Nevertheless, if it turns on while driving, it may indicate several troubles, we will try to summarize the main ones.

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

A glow light that comes on while driving on your Toyota Yaris or at any other time other than when the engine is started is meant to alert you to a problem other than your spark plugs, we will check out this now. In any case, connecting your vehicle to the diagnostic tool will allow you to carefully interpret the reason for the light up of your glow light.

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

The first probability is that you notice that your glow plug light comes on while driving your Toyota Yaris and that you also knowledge a loss of power. In such a case, different concerns can describe its lightning. Here is a list of the main reasons:

  • Trouble of EGR valve, in fact, if you go through a loss of power, it is possible that your EGR valve is blocked, in this case, it is expected that your preheat light comes on while driving on Toyota Yaris because it is one of the issue of which it is meant to warn you. Have the status of your valve checked out
  • Issue linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can lead to 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 destroyed by filings or other possible foreign bodies that disturb its proper operation.
  • Finally, the last trouble that could lead to a glow indicator light on your Toyota Yaris 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 Yaris

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

  • Glow plug relays or fuses to be swapped out, 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 solutions first because it is not easy to find it alone, we suggest you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error
  • If perhaps you have any further questions about the Toyota Yaris, do not hesitate to consult our Toyota Yaris category.