A new light on your dashboard? You don’t find out why it doesn’t shut off… It’s typical, an auto is complicated and there are various factors why a light may come on. If your glow plug light comes on while driving your Audi A2, it might point out different problems. On this page, we will do anything we can to support you see things more clearly. First, we will discover how the preheating light on your Audi A2 works, and then the different motives it lights up when you are driving

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What is the purpose of my Audi A2 glow plug light?

The primary role of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to ensure that your glow plugs are working properly. In fact, it must light up when you switch on your Audi A2 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 meant to stay or come on while driving with your automobile. However, if it comes on while driving, it may indicate multiple issues, we will try to summarize the most important ones.

What to do if the glow plug light comes on while driving on my Audi A2?

A glow light that comes on while driving on your Audi A2 or at any other time other than when the engine is started is meant to inform you to a problem other than your spark plugs, we will check out this now. No matter the reason, a switch to the diagnostic tool will allow you to carefully translate the motive for the light up of your glow light.

My Audi A2 glow light comes on and I’m having a loss of power

The first probability is that you identify that your glow plug light comes on while driving your Audi A2 and that you also encounter a loss of power. In this case, different problems can explain its presence. Here is a list of the most important factors:

  • Issue of EGR valve, indeed, if you undergo a loss of power, it is possible that your EGR valve is clogged, in this case, it is rational that your preheat light comes on while driving on Audi A2 because it is one of the failures of which it is meant to warn you. Have the status of your valve looked at
  • Problem associated with the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can bring about turbo boost and a disturbance in the operation of the turbo.
  • Problem 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 disrupt its proper operation.
  • Finally, the last trouble that could lead to a glow indicator light on your Audi A2 coupled with a loss of power, is that your fuel filter is too dirty, you should get 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 Audi A2

Finally, we’ll give you the motives for a glow plug light that comes on on your Audi A2 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 get rid of the trouble.
  • 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 recommend you to go to your auto mechanic.
  • Faulty injection pressure sensor, ECU error

    • To get more tips on the Audi A2, take a look at the Audi A2 category.