A new light on your dashboard? You don’t find out why it doesn’t turn off… It’s normal, an automobile is elaborate and there are various motives why a light could come on. In the event that your glow plug light comes on while driving your Audi Q8, it might reveal different issues. In this post, we will do anything we can to help you see things more clearly. First, we will discover how the preheating light on your Audi Q8 functions, and then the different reasons it lights up when you are driving

glow-plug-light-audi-q8

What is the purpose of my Audi Q8 glow plug light?

The main purpose of the engine glow plug light, which is in most cases represented by a yellow coil, is to assure that your glow plugs are working properly. In fact, it must light up when you switch on your Audi Q8 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 meant to stay or come on while driving with your automobile. However, if it comes on while driving, it may show multiple failures, we will try to explain the main ones.

What to do if the glow plug light comes on while driving on my Audi Q8?

A glow light that comes on while driving on your Audi Q8 or at any other time other than when the engine is started is designed to warn you to a fault other than your spark plugs, we will check out this right now. Whatever the case, a switch to the diagnostic tool will allow you to carefully translate the reason for the light up of your glow light.

My Audi Q8 glow light comes on and I’m experiencing a loss of power

The first probability is that you recognize that your glow plug light comes on while driving your Audi Q8 and that you also encounter a loss of power. In such a case, different problems can explain its presence. Here is a list of the main motives:

  • 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 logical that your preheat light comes on while driving on Audi Q8 because it is one of the failures of which it is intended to warn you. Have the status of your valve examined
  • Problem related to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can cause turbo boost and a disturbance in the operation of the turbo.
  • Problem in connection 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 affect its proper performing.
  • Finally, the last trouble that could lead to a glow indicator light on your Audi Q8 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 Q8

To finish , we’ll give you the reasons for a glow plug light that comes on on your Audi Q8 without you feeling any difference in power or automobile behaviour. Generally, 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 trouble.
  • You have a false contact somewhere in your electrical circuit, test the other solutions first because it is not easy to find it alone, we encourage you to go to your auto mechanic.
  • Faulty injection pressure sensor, ECU error

    • To find more tips on the Audi Q8, take a look at the Audi Q8 category.