A new warning light on your dashboard? You don’t figure out why it doesn’t switch off… It’s typical, an automobile is elaborate and there are various reasons why a light could occur. In the event that your glow plug light comes on while driving your Audi Q7, it may possibly reveal several problems. In this article, we will do everything we can to help you see things more clearly. First, we will see how the preheating light on your Audi Q7 works, and then the different reasons it lights up when you are driving

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What is the role of my Audi Q7 glow plug light?

The primary 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 Q7 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 supposed to stay or come on while driving with your automobile. Nevertheless, if it comes on while driving, it may suggest several issues, we will try to point out the main ones.

What to do if the glow plug light comes on while driving on my Audi Q7?

A glow light that comes on while driving on your Audi Q7 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 look at this now. Whatever the case, connecting your vehicle to the diagnostic tool will allow you to precisely understand the reason for the light up of your glow light.

My Audi Q7 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 Q7 and that you also encounter a loss of power. In such a case, several concerns can demonstrate its presence. Here is a list of the main reasons:

  • Trouble of EGR valve, indeed, if you undergo a loss of power, it is possible that your EGR valve is blocked, in such a case, it is expected that your preheat light comes on while driving on Audi Q7 because it is one of the failures of which it is designed to notify you. Have the status of your valve checked out
  • Trouble related 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.
  • Trouble 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 disturb its proper performing.
  • Finally, the last trouble that could lead to a glow indicator light on your Audi Q7 coupled with a loss of power, is that your fuel filter is too dirty, you should come to 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 Audi Q7

Finally, we’ll give you the reasons for a glow plug light that comes on on your Audi Q7 without you feeling any difference in power or automobile behaviour. In general, this is an electronic fault:

  • 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 fix the trouble.
  • 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 recommend you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

    • If you have any additional questions about the Audi Q7, do not hesitate to consult our Audi Q7 category.