A new light on your dashboard? You don’t figure out why it doesn’t switch off… It’s normal, an automobile is elaborate and there are multiple causes why a light could occur. In cases where your glow plug light comes on while driving your Volkswagen Transporter 5, it may signify several things. On this page, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Volkswagen Transporter 5 works, and then the different reasons it lights up when you are driving

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What is the role of my Volkswagen Transporter 5 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 correctly. In reality, it must light up when you switch on your Volkswagen Transporter 5 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 expected to stay or come on while driving with your automobile. But, if it comes on while driving, it may show several troubles, 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 5?

A glow light that comes on while driving on your Volkswagen Transporter 5 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 check out this now. In any case, a switch to the diagnostic tool will allow you to accurately understand the explanation for the light up of your glow light.

My Volkswagen Transporter 5 glow light comes on and I’m experiencing a loss of power

The first situation is that you detect that your glow plug light comes on while driving your Volkswagen Transporter 5 and that you also experience a loss of power. In such a case, several problems can demonstrate its presence. 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 clogged, in this instance, it is obvious that your preheat light comes on while driving on Volkswagen Transporter 5 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 control the turbo intake pressure, which can cause turbo boost and a disturbance in the operation of the turbo.
  • Trouble related to 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 performance.
  • Finally, the last trouble that could lead to a glow indicator light on your Volkswagen Transporter 5 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 5

To conclude, we’ll give you the reasons for a glow plug light that comes on on your Volkswagen Transporter 5 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 resolve the trouble.
  • You have a false contact somewhere in your electrical circuit, test the other solutions first because it is not easy to find it alone, we suggest you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error
  • To find more tips on the Volkswagen Transporter 5, take a look at the Volkswagen Transporter 5 category.