A new light on your dashboard? You don’t understand why it doesn’t turn off… It’s normal, a car is complicated and there are various causes why a light might come on. If it turns out your glow plug light comes on while driving your Toyota Corolla Verso, it may possibly show some problems. In the following paragraphs, we will do everything we can to support you see things more clearly. First, we will find out how the preheating light on your Toyota Corolla Verso operates, and then the different reasons it lights up when you are driving


What is the purpose of my Toyota Corolla Verso glow plug light?

The primary intent of the engine glow plug light, which is generally symbolized by a yellow coil, is to ensure that your glow plugs are working properly. In fact, it must light up when you switch on your Toyota Corolla Verso 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. However, 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 Corolla Verso?

A glow light that comes on while driving on your Toyota Corolla Verso or at any other time other than when the engine is started is meant to alert you to a fault other than your spark plugs, we will look at this now. Whatever the case, plug in your car to the diagnostic tool will allow you to precisely understand the motive for the light up of your glow light.

My Toyota Corolla Verso glow light comes on and I’m suffering from a loss of power

The first probability is that you identify that your glow plug light comes on while driving your Toyota Corolla Verso and that you also experience a loss of power. In this case, some problems can describe its presence. Here is a list of the main causes:

  • Problem of EGR valve, in fact, if you undergo a loss of power, it is possible that your EGR valve is clogged, in this case, it is rational that your preheat light comes on while driving on Toyota Corolla Verso because it is one of the issue of which it is designed to alert you. Have the status of your valve tested
  • Problem linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can result in turbo boost and a disturbance in the operation of the turbo.
  • Problem in connection with the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that disrupt its proper functioning.
  • Finally, the last problem that could lead to a glow indicator light on your Toyota Corolla Verso coupled with a loss of power, is that your fuel filter is too dirty, you should get 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 Corolla Verso

To conclude, we’ll give you the reasons for a glow plug light that comes on on your Toyota Corolla Verso without you feeling any difference in power or motor vehicle behaviour. Generally, this is an electronic fault:

  • Glow plug relays or fuses to be changed, 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 resolve the problem.
  • You have a false contact somewhere in your electrical circuit, test the other alternatives 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 need more tutorials on the Toyota Corolla Verso, go to our Toyota Corolla Verso category.