A new light on your dashboard? You don’t find out why it doesn’t shut off… It’s typical, an auto is elaborate and there are multiple factors why a light might come on. In the event that your glow plug light comes on while driving your Volkswagen Lupo, it may reveal different things. On this page, we will do everything we can to support you see things more clearly. First, we will find out how the preheating light on your Volkswagen Lupo operates, and then the different reasons it lights up when you are driving

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What is the goal of my Volkswagen Lupo glow plug light?

The primary goal of the engine glow plug light, which is in most cases symbolized by a yellow coil, is to guarantee that your glow plugs are working effectively. In fact, it must light up when you switch on your Volkswagen Lupo 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 car. Nevertheless, if it comes on while driving, it may reveal multiple troubles, we will try to describe the most important ones.

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

A glow light that comes on while driving on your Volkswagen Lupo or at any other time other than when the engine is started is designed to alert you to a fault 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 accurately translate the reason for the light up of your glow light.

My Volkswagen Lupo glow light comes on and I’m encountering a loss of power

The first possibility is that you recognize that your glow plug light comes on while driving your Volkswagen Lupo and that you also encounter a loss of power. In this instance, different trouble can describe its lightning. Here is a list of the most important factors:

  • Issue of EGR valve, indeed, if you suffer a loss of power, it is possible that your EGR valve is clogged, in this case, it is expected that your preheat light comes on while driving on Volkswagen Lupo because it is one of the issue of which it is meant to notify you. Have the status of your valve inspected
  • 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 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 disrupt its proper operation.
  • Finally, the last issue that could lead to a glow indicator light on your Volkswagen Lupo 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 Lupo

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

  • Glow plug relays or fuses to be changed, 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 issue.
  • You have a false contact somewhere in your electrical circuit, test out the other options first because it is not easy to find it alone, we advise you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

    • If perhaps you have any further questions about the Volkswagen Lupo, do not hesitate to consult our Volkswagen Lupo category.