A new light on your dashboard? You don’t find out why it doesn’t turn off… It’s normal, an automobile is complicated and there are various factors why a light could occur. In cases where your glow plug light comes on while driving your Volkswagen Polo, it may possibly suggest different problems. In this article, we will do anything we can to help you see things more clearly. First, we will discover how the preheating light on your Volkswagen Polo works, and then the different causes it lights up when you are driving

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What is the purpose of my Volkswagen Polo glow plug light?

The primary intent of the engine glow plug light, which is generally symbolized by a yellow coil, is to assure that your glow plugs are working properly. Indeed, it must light up when you switch on your Volkswagen Polo 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 expected to stay or come on while driving with your car. Nevertheless, if it turns on while driving, it may show several issues, we will try to describe the most important ones.

What to do if the glow plug light comes on while driving on my Volkswagen Polo?

A glow light that comes on while driving on your Volkswagen Polo or at any other time other than when the engine is started is meant to inform 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 precisely translate the motive for the light up of your glow light.

My Volkswagen Polo glow light comes on and I’m experiencing a loss of power

The first probability is that you recognize that your glow plug light comes on while driving your Volkswagen Polo and that you also experience a loss of power. In this instance, different concerns can explain its presence. Here is a list of the most important factors:

  • Issue 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 obvious that your preheat light comes on while driving on Volkswagen Polo because it is one of the failures of which it is intended to notify you. Have the status of your valve inspected
  • Problem associated with the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can cause turbo boost and a perturbation in the performance 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 disturb its proper operation.
  • Finally, the last problem that could lead to a glow indicator light on your Volkswagen Polo coupled with a loss of power, is that your fuel filter is too dirty, you should experience 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 Volkswagen Polo

To finish , we’ll give you the causes for a glow plug light that comes on on your Volkswagen Polo without you feeling any difference in power or car behaviour. Ordinarily, this is an electronic problem:

  • 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 recommend you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error
  • Whenever you have any additional questions about the Volkswagen Polo, do not hesitate to consult our Volkswagen Polo category.