A new warning light on your dashboard? You don’t understand why it doesn’t switch off… It’s normal, an automobile is complicated and there are many motives why a light may come on. If your glow plug light comes on while driving your Volkswagen Up!, it may possibly signify different problems. In the following paragraphs, we will do everything we can to help you see things more clearly. First, we will find out how the preheating light on your Volkswagen Up! works, and then the different motives it lights up when you are driving

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What is the goal of my Volkswagen Up! glow plug light?

The main purpose of the engine glow plug light, which is most of the time represented by a yellow coil, is to make sure that your glow plugs are working effectively. Indeed, it must light up when you switch on your Volkswagen Up! 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 vehicle. However, if it comes on while driving, it may indicate multiple issues, we will try to summarize the main ones.

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

A glow light that comes on while driving on your Volkswagen Up! or at any other time other than when the engine is started is designed to alert you to a problem 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 Up! glow light comes on and I’m suffering from a loss of power

The first probability is that you perceive that your glow plug light comes on while driving your Volkswagen Up! and that you also experience a loss of power. In this instance, different trouble can explain its presence. Here is a list of the main motives:

  • Problem of EGR valve, in reality, if you go through a loss of power, it is possible that your EGR valve is clogged, in such a case, it is rational that your preheat light comes on while driving on Volkswagen Up! because it is one of the problem of which it is supposed to notify you. Have the status of your valve examined
  • Issue associated with the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can cause turbo boost and a perturbation in the operation of the turbo.
  • Issue linked to 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 trouble that could lead to a glow indicator light on your Volkswagen Up! coupled with a loss of power, is that your fuel filter is too dirty, you should 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 Up!

To finish , we’ll give you the motives for a glow plug light that comes on on your Volkswagen Up! without you feeling any difference in power or vehicle behaviour. In most cases, this is an electronic problem:

  • 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 trouble.
  • You have a false contact somewhere in your electrical circuit, check the other options first because it is not easy to find it alone, we recommend you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

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