A new warning light on your dashboard? You don’t find out why it doesn’t switch off… It’s normal, a vehicle is complicated and there are various reasons why a light may occur. In cases where your glow plug light comes on while driving your CUPRA FORMENTOR, it may possibly point out different things. In this article, we will do everything we can to support you see things more clearly. First, we will see how the preheating light on your CUPRA FORMENTOR works, and then the different causes it lights up when you are driving

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What is the role of my CUPRA FORMENTOR glow plug light?

The primary role of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to make sure that your glow plugs are working correctly. In reality, it must light up when you switch on your CUPRA FORMENTOR 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 meant to stay or come on while driving with your car. But, if it turns on while driving, it may indicate different issues, we will try to explain the most important ones.

What to do if the glow plug light comes on while driving on my CUPRA FORMENTOR?

A glow light that comes on while driving on your CUPRA FORMENTOR 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 check out this now. In any case, a switch to the diagnostic tool will allow you to accurately interpret the motive for the light up of your glow light.

My CUPRA FORMENTOR glow light comes on and I’m experiencing a loss of power

The first probability is that you detect that your glow plug light comes on while driving your CUPRA FORMENTOR and that you also encounter a loss of power. In such a case, different problems can explain its presence. Here is a list of the most important reasons:

  • Trouble of EGR valve, indeed, if you undergo a loss of power, it is possible that your EGR valve is blocked, in such a case, it is obvious that your preheat light comes on while driving on CUPRA FORMENTOR because it is one of the problem of which it is designed to notify you. Have the status of your valve inspected
  • Problem related 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 perturbation in the performance 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 function.
  • Finally, the last problem that could lead to a glow indicator light on your CUPRA FORMENTOR 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 CUPRA FORMENTOR

To finish , we’ll give you the causes for a glow plug light that comes on on your CUPRA FORMENTOR 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 solve 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 auto technician.
  • Faulty injection pressure sensor, ECU error

    • If you have any further questions about the CUPRA FORMENTOR, do not hesitate to consult our CUPRA FORMENTOR category.