A new light on your dashboard? You don’t understand why it doesn’t shut off… It’s normal, an auto is elaborate and there are many causes why a light could occur. If it turns out your glow plug light comes on while driving your Volkswagen Routan, it may reveal different concerns. In the following paragraphs, we will do anything we can to help you see things more clearly. First, we will discover how the preheating light on your Volkswagen Routan functions, and then the different causes it lights up when you are driving

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What is the purpose of my Volkswagen Routan glow plug light?

The primary goal of the engine glow plug light, which is most of the time represented by a yellow coil, is to guarantee that your glow plugs are working effectively. In reality, it must light up when you switch on your Volkswagen Routan 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 car. Nevertheless, if it turns on while driving, it may reveal multiple troubles, we will try to describe the main ones.

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

A glow light that comes on while driving on your Volkswagen Routan or at any other time other than when the engine is started is designed to inform you to a fault other than your spark plugs, we will look at this now. No matter the reason, plug in your car to the diagnostic tool will allow you to precisely understand the motive for the light up of your glow light.

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

The first possibility is that you detect that your glow plug light comes on while driving your Volkswagen Routan and that you also experience a loss of power. In this case, different complications can explain its lightning. Here is a list of the main causes:

  • Problem of EGR valve, in reality, if you undergo 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 Routan because it is one of the failures of which it is intended to notify you. Have the status of your valve checked out
  • Trouble linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can lead to turbo boost and a disturbance in the performance of the turbo.
  • Trouble associated with the injection, either an injector that has seized up or the injection pump that is broken by filings or other possible foreign bodies that disturb its proper performance.
  • Finally, the last problem that could lead to a glow indicator light on your Volkswagen Routan coupled with a loss of power, is that your fuel filter is too dirty, you should come to feel 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 Routan

To finish , we’ll give you the causes for a glow plug light that comes on on your Volkswagen Routan without you feeling any difference in power or car behaviour. Ordinarily, this is an electronic fault:

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

    • In the event that you have any additional questions about the Volkswagen Routan, do not hesitate to consult our Volkswagen Routan category.