A new warning light on your dashboard? You don’t find out why it doesn’t switch off… It’s normal, an automobile is elaborate and there are various factors why a light may occur. If your glow plug light comes on while driving your Audi Rs5, it may possibly suggest different things. In this article, we will do everything we can to support you see things more clearly. First, we will find out how the preheating light on your Audi Rs5 works, and then the different reasons it lights up when you are driving


What is the goal of my Audi Rs5 glow plug light?

The primary goal 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 effectively. Indeed, it must light up when you switch on your Audi Rs5 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 supposed to stay or come on while driving with your automobile. Nevertheless, if it comes on while driving, it may suggest different issues, we will try to summarize the main ones.

What to do if the glow plug light comes on while driving on my Audi Rs5?

A glow light that comes on while driving on your Audi Rs5 or at any other time other than when the engine is started is meant to warn you to a fault other than your spark plugs, we will look at this now. No matter the reason, plug in your car to the diagnostic tool will allow you to properly translate the explanation for the light up of your glow light.

My Audi Rs5 glow light comes on and I’m encountering a loss of power

The first probability is that you detect that your glow plug light comes on while driving your Audi Rs5 and that you also encounter a loss of power. In such a case, different complications can demonstrate its presence. Here is a list of the main factors:

  • Problem of EGR valve, indeed, if you go through a loss of power, it is possible that your EGR valve is blocked, in this instance, it is rational that your preheat light comes on while driving on Audi Rs5 because it is one of the problem of which it is designed to alert you. Have the status of your valve examined
  • Trouble associated with the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can cause turbo boost and a perturbation in the operation of the turbo.
  • Trouble linked to the injection, either an injector that has seized up or the injection pump that is damaged by filings or other possible foreign bodies that disrupt its proper function.
  • Finally, the last issue that could lead to a glow indicator light on your Audi Rs5 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 Audi Rs5

Finally, we’ll give you the reasons for a glow plug light that comes on on your Audi Rs5 without you feeling any difference in power or automobile behaviour. In general, this is an electronic fault:

  • Glow plug relays or fuses to be changed, 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 issue.
  • You have a false contact somewhere in your electrical circuit, test out the other solutions first because it is not easy to find it alone, we encourage you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error
  • To find more tips on the Audi Rs5, take a look at the Audi Rs5 category.