A new warning light on your dashboard? You don’t understand why it doesn’t shut off… It’s normal, a car is complex and there are various causes why a light might occur. If your glow plug light comes on while driving your Audi R8, it might indicate some problems. In the following paragraphs, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Audi R8 functions, and then the different explanations it lights up when you are driving

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What is the purpose of my Audi R8 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 ensure that your glow plugs are working effectively. Indeed, it must light up when you switch on your Audi R8 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 vehicle. Nevertheless, if it turns on while driving, it may show multiple failures, we will try to describe the most important ones.

What to do if the glow plug light comes on while driving on my Audi R8?

A glow light that comes on while driving on your Audi R8 or at any other time other than when the engine is started is meant to inform you to a fault other than your spark plugs, we will take a look at this now. Whatever the case, connecting your vehicle to the diagnostic tool will allow you to accurately interpret the cause for the light up of your glow light.

My Audi R8 glow light comes on and I’m experiencing a loss of power

The first situation is that you recognize that your glow plug light comes on while driving your Audi R8 and that you also encounter a loss of power. In this case, some concerns can explain its presence. Here is a list of the most important causes:

  • Problem of EGR valve, in reality, if you go through a loss of power, it is possible that your EGR valve is blocked, in this case, it is obvious that your preheat light comes on while driving on Audi R8 because it is one of the issue of which it is supposed to warn you. Have the status of your valve checked
  • Problem linked to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can result in turbo boost and a perturbation in the operation of the turbo.
  • Problem relevant 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 affect its proper performing.
  • Finally, the last problem that could lead to a glow indicator light on your Audi R8 coupled with a loss of power, is that your fuel filter is too dirty, you should experience 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 R8

To conclude, we’ll give you the explanations for a glow plug light that comes on on your Audi R8 without you feeling any difference in power or vehicle behaviour. In general, this is an electronic fault:

  • Glow plug relays or fuses to be replaced, 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 solve the problem.
  • You have a false contact somewhere in your electrical circuit, test out the other alternatives first because it is not easy to find it alone, we encourage you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

    • In the event that you have any further questions about the Audi R8, do not hesitate to consult our Audi R8 category.