A new warning light on your dashboard? You don’t understand why it doesn’t turn off… It’s typical, a car is complex and there are many motives why a light may occur. In the event that your glow plug light comes on while driving your Volkswagen Polo 4, it may possibly suggest several concerns. In this post, we will do everything we can to support you see things more clearly. First, we will find out how the preheating light on your Volkswagen Polo 4 operates, and then the different reasons it lights up when you are driving

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What is the purpose of my Volkswagen Polo 4 glow plug light?

The primary goal of the engine glow plug light, which is generally represented 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 Volkswagen Polo 4 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. But, if it turns on while driving, it may indicate several troubles, we will try to point out the most important ones.

What to do if the glow plug light comes on while driving on my Volkswagen Polo 4?

A glow light that comes on while driving on your Volkswagen Polo 4 or at any other time other than when the engine is started is designed to notify you to a problem other than your spark plugs, we will check out this now. Whatever the case, a switch to the diagnostic tool will allow you to precisely interpret the cause for the light up of your glow light.

My Volkswagen Polo 4 glow light comes on and I’m having a loss of power

The first situation is that you notice that your glow plug light comes on while driving your Volkswagen Polo 4 and that you also experience a loss of power. In this case, several complications can demonstrate its lightning. Here is a list of the most important motives:

  • Issue of EGR valve, indeed, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this case, it is obvious that your preheat light comes on while driving on Volkswagen Polo 4 because it is one of the issue of which it is supposed to notify you. Have the status of your valve examined
  • Problem related to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can result in turbo boost and a perturbation 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 broken by filings or other possible foreign bodies that disturb its proper performing.
  • Finally, the last problem that could lead to a glow indicator light on your Volkswagen Polo 4 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 4

Finally, we’ll give you the reasons for a glow plug light that comes on on your Volkswagen Polo 4 without you feeling any difference in power or motor vehicle behaviour. Generally, this is an electronic problem:

  • Glow plug relays or fuses to be changed, 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 problem.
  • You have a false contact somewhere in your electrical circuit, test out the other alternatives first because it is not easy to find it alone, we encourage you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • To discover more tips on the Volkswagen Polo 4, take a look at the Volkswagen Polo 4 category.