A new light on your dashboard? You don’t figure out why it doesn’t turn off… It’s typical, an automobile is elaborate and there are many causes why a light might come on. If your glow plug light comes on while driving your Volkswagen Polo 3, it may reveal several problems. In this article, we will do everything we can to help you see things more clearly. First, we will see how the preheating light on your Volkswagen Polo 3 works, and then the different explanations it lights up when you are driving

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What is the role of my Volkswagen Polo 3 glow plug light?

The primary purpose of the engine glow plug light, which is most of the time represented 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 Volkswagen Polo 3 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 comes on while driving, it may reveal different failures, we will try to detail the main ones.

What to do if the glow plug light comes on while driving on my Volkswagen Polo 3?

A glow light that comes on while driving on your Volkswagen Polo 3 or at any other time other than when the engine is started is intended to notify you to a problem other than your spark plugs, we will take a look at this right now. Whatever the case, plug in your car to the diagnostic tool will allow you to precisely interpret the explanation for the light up of your glow light.

My Volkswagen Polo 3 glow light comes on and I’m having a loss of power

The first probability is that you perceive that your glow plug light comes on while driving your Volkswagen Polo 3 and that you also experience a loss of power. In this case, several concerns can describe its lightning. Here is a list of the main causes:

  • Problem of EGR valve, in reality, if you suffer a loss of power, it is possible that your EGR valve is blocked, in this instance, it is expected that your preheat light comes on while driving on Volkswagen Polo 3 because it is one of the problem of which it is intended to notify you. Have the status of your valve inspected
  • Trouble related to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can cause turbo boost and a perturbation in the performance of the turbo.
  • Trouble related to the injection, either an injector that has seized up or the injection pump that is damaged 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 Volkswagen Polo 3 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 Volkswagen Polo 3

Finally, we’ll give you the explanations for a glow plug light that comes on on your Volkswagen Polo 3 without you feeling any difference in power or motor vehicle behaviour. In general, 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, check the other solutions first because it is not easy to find it alone, we suggest you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error
  • Whenever you have any additional questions about the Volkswagen Polo 3, do not hesitate to consult our Volkswagen Polo 3 category.