A new warning light on your dashboard? You don’t understand why it doesn’t switch off… It’s normal, an auto is elaborate and there are various causes why a light could occur. In the event that your glow plug light comes on while driving your Volkswagen Polo 6, it may possibly signal several concerns. In this post, we will do anything we can to support you see things more clearly. First, we will discover how the preheating light on your Volkswagen Polo 6 works, and then the different explanations it lights up when you are driving

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What is the purpose of my Volkswagen Polo 6 glow plug light?

The primary purpose of the engine glow plug light, which is in most cases symbolized by a yellow coil, is to assure that your glow plugs are working correctly. In fact, it must light up when you switch on your Volkswagen Polo 6 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 meant to stay or come on while driving with your motor vehicle. However, if it turns on while driving, it may reveal multiple failures, we will try to explain the most important ones.

What to do if the glow plug light comes on while driving on my Volkswagen Polo 6?

A glow light that comes on while driving on your Volkswagen Polo 6 or at any other time other than when the engine is started is meant to warn you to a problem other than your spark plugs, we will take a look at 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 6 glow light comes on and I’m encountering a loss of power

The first situation is that you notice that your glow plug light comes on while driving your Volkswagen Polo 6 and that you also encounter a loss of power. In this instance, several trouble can explain its presence. Here is a list of the most important causes:

  • Trouble of EGR valve, indeed, if you undergo a loss of power, it is possible that your EGR valve is clogged, in this instance, it is expected that your preheat light comes on while driving on Volkswagen Polo 6 because it is one of the failures of which it is expected to warn you. Have the status of your valve tested
  • Trouble 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.
  • Trouble relevant to the injection, either an injector that has seized up or the injection pump that is malfunctioned by filings or other possible foreign bodies that disrupt its proper function.
  • Finally, the last problem that could lead to a glow indicator light on your Volkswagen Polo 6 coupled with a loss of power, is that your fuel filter is too dirty, you should feel 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 6

To conclude, we’ll give you the explanations for a glow plug light that comes on on your Volkswagen Polo 6 without you feeling any difference in power or motor vehicle behaviour. Generally, 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 fix the problem.
  • You have a false contact somewhere in your electrical circuit, test the other options 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

    • If you want more tutorials on the Volkswagen Polo 6, go to our Volkswagen Polo 6 category.