A new light on your dashboard? You don’t find out why it doesn’t turn off… It’s normal, an automobile is complex and there are various motives why a light might come on. If your glow plug light comes on while driving your Volkswagen Touareg, it might suggest different issues. On this page, 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 Touareg works, and then the different reasons it lights up when you are driving

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What is the goal of my Volkswagen Touareg glow plug light?

The main goal of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to assure that your glow plugs are working properly. In reality, it must light up when you switch on your Volkswagen Touareg 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 comes on while driving, it may show different issues, we will try to detail the most important ones.

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

A glow light that comes on while driving on your Volkswagen Touareg or at any other time other than when the engine is started is meant to notify you to a fault other than your spark plugs, we will take a look at this right now. No matter the reason, connecting your vehicle to the diagnostic tool will allow you to precisely interpret the motive for the light up of your glow light.

My Volkswagen Touareg glow light comes on and I’m encountering a loss of power

The first probability is that you identify that your glow plug light comes on while driving your Volkswagen Touareg and that you also encounter a loss of power. In this case, different concerns can explain its presence. Here is a list of the most important motives:

  • Issue of EGR valve, in fact, if you suffer a loss of power, it is possible that your EGR valve is clogged, in such a case, it is rational that your preheat light comes on while driving on Volkswagen Touareg because it is one of the failures of which it is expected to warn you. Have the status of your valve inspected
  • Issue associated with the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can result in turbo boost and a disturbance in the performance of the turbo.
  • Issue 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 affect its proper functioning.
  • Finally, the last issue that could lead to a glow indicator light on your Volkswagen Touareg coupled with a loss of power, is that your fuel filter is too dirty, you should encounter 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 Touareg

To finish , we’ll give you the reasons for a glow plug light that comes on on your Volkswagen Touareg without you feeling any difference in power or motor vehicle behaviour. In general, this is an electronic fault:

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

    • If you want more guides on the Volkswagen Touareg, go to our Volkswagen Touareg category.