A new warning light on your dashboard? You don’t find out why it doesn’t switch off… It’s typical, an automobile is elaborate and there are many causes why a light could come on. If it turns out your glow plug light comes on while driving your Volkswagen T-roc, it may possibly signal different issues. In the following paragraphs, we will do anything we can to help you see things more clearly. First, we will find out how the preheating light on your Volkswagen T-roc operates, and then the different motives it lights up when you are driving

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What is the role of my Volkswagen T-roc glow plug light?

The primary role of the engine glow plug light, which is most of the time represented by a yellow coil, is to ensure that your glow plugs are working correctly. In reality, it must light up when you switch on your Volkswagen T-roc 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 supposed to stay or come on while driving with your car. Nevertheless, if it comes on while driving, it may reveal 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 T-roc?

A glow light that comes on while driving on your Volkswagen T-roc 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 now. No matter the reason, plug in your car to the diagnostic tool will allow you to precisely understand the explanation for the light up of your glow light.

My Volkswagen T-roc 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 T-roc and that you also knowledge a loss of power. In this case, different problems can describe its lightning. Here is a list of the most important causes:

  • Problem of EGR valve, in reality, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this instance, it is logical that your preheat light comes on while driving on Volkswagen T-roc because it is one of the problem of which it is expected to alert 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 bring about turbo boost and a disturbance in the operation of the turbo.
  • Trouble in connection with the injection, either an injector that has seized up or the injection pump that is damaged by filings or other possible foreign bodies that disturb its proper function.
  • Finally, the last issue that could lead to a glow indicator light on your Volkswagen T-roc 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 T-roc

Finally, we’ll give you the motives for a glow plug light that comes on on your Volkswagen T-roc without you feeling any difference in power or car behaviour. In most cases, 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 get rid of the issue.
  • 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 advise you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • If you want more guides on the Volkswagen T-roc, go to our Volkswagen T-roc category.