A new light on your dashboard? You don’t find out why it doesn’t switch off… It’s typical, an auto is complex and there are various motives why a light could come on. If your glow plug light comes on while driving your Volkswagen Transporter 4, it may reveal different 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 4 works, and then the different causes it lights up when you are driving

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What is the role of my Volkswagen Transporter 4 glow plug light?

The main goal of the engine glow plug light, which is generally symbolized by a yellow coil, is to make sure that your glow plugs are working correctly. In reality, it must light up when you switch on your Volkswagen Transporter 4 to tell you that they are heating the intake air in your cylinders and must go out after a few moments when the engine is running. This preheat light is therefore not supposed to stay or come on while driving with your automobile. However, if it turns on while driving, it may reveal several failures, we will try to point out the main ones.

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

A glow light that comes on while driving on your Volkswagen Transporter 4 or at any other time other than when the engine is started is intended to alert you to a problem other than your spark plugs, we will check out this right now. Whatever the case, plug in your car to the diagnostic tool will allow you to carefully understand the motive for the light up of your glow light.

My Volkswagen Transporter 4 glow light comes on and I’m suffering from a loss of power

The first situation is that you identify that your glow plug light comes on while driving your Volkswagen Transporter 4 and that you also encounter a loss of power. In this instance, different problems can describe its presence. Here is a list of the main motives:

  • Trouble of EGR valve, in fact, if you are affected a loss of power, it is possible that your EGR valve is clogged, in such a case, it is expected that your preheat light comes on while driving on Volkswagen Transporter 4 because it is one of the problem of which it is designed to alert you. Have the status of your valve examined
  • Issue related to 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 performance of the turbo.
  • Issue associated with the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that affect its proper function.
  • Finally, the last trouble that could lead to a glow indicator light on your Volkswagen Transporter 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 Transporter 4

Finally, we’ll give you the causes for a glow plug light that comes on on your Volkswagen Transporter 4 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 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 trouble.
  • 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 advise you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

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