A new warning light on your dashboard? You don’t understand why it doesn’t switch off… It’s typical, an automobile is complex and there are multiple causes why a light may come on. In cases where your glow plug light comes on while driving your Volkswagen Transporter, it may possibly point out several concerns. On this page, we will do everything we can to help you see things more clearly. First, we will discover how the preheating light on your Volkswagen Transporter operates, and then the different causes it lights up when you are driving

glow-plug-light-volkswagen-transporter

What is the role of my Volkswagen Transporter glow plug light?

The primary role of the engine glow plug light, which is in most cases represented by a yellow coil, is to guarantee that your glow plugs are working correctly. Indeed, it must light up when you switch on your Volkswagen Transporter 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 automobile. Nevertheless, if it turns on while driving, it may indicate different issues, 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 Transporter?

A glow light that comes on while driving on your Volkswagen Transporter or at any other time other than when the engine is started is intended to warn you to a problem other than your spark plugs, we will look at this right now. Whatever the case, connecting your vehicle to the diagnostic tool will allow you to precisely translate the explanation for the light up of your glow light.

My Volkswagen Transporter glow light comes on and I’m suffering from a loss of power

The first possibility is that you perceive that your glow plug light comes on while driving your Volkswagen Transporter and that you also experience a loss of power. In this instance, several complications can describe its lightning. Here is a list of the most important causes:

  • Trouble of EGR valve, indeed, if you suffer a loss of power, it is possible that your EGR valve is blocked, in this case, it is expected that your preheat light comes on while driving on Volkswagen Transporter because it is one of the problem of which it is meant to notify you. Have the status of your valve tested
  • Issue linked to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can lead to 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 problem that could lead to a glow indicator light on your Volkswagen Transporter 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 Transporter

Finally, we’ll give you the causes for a glow plug light that comes on on your Volkswagen Transporter without you feeling any difference in power or automobile behaviour. In most cases, this is an electronic problem:

  • Glow plug relays or fuses to be replaced, 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 out the other alternatives first because it is not easy to find it alone, we encourage you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

    • To find more tips on the Volkswagen Transporter, take a look at the Volkswagen Transporter category.