A new warning light on your dashboard? You don’t find out why it doesn’t turn off… It’s typical, a vehicle is complex and there are various motives why a light may occur. In the event that your glow plug light comes on while driving your Audi S3, it may show several concerns. In the following paragraphs, we will do anything we can to help you see things more clearly. First, we will find out how the preheating light on your Audi S3 functions, and then the different motives it lights up when you are driving

glow-plug-light-audi-s3

What is the goal of my Audi S3 glow plug light?

The primary purpose 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 S3 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 motor vehicle. Nevertheless, if it comes on while driving, it may indicate multiple troubles, we will try to point out the main ones.

What to do if the glow plug light comes on while driving on my Audi S3?

A glow light that comes on while driving on your Audi S3 or at any other time other than when the engine is started is intended to inform you to a problem other than your spark plugs, we will check out this now. No matter the reason, plug in your car to the diagnostic tool will allow you to accurately interpret the motive for the light up of your glow light.

My Audi S3 glow light comes on and I’m experiencing a loss of power

The first probability is that you perceive that your glow plug light comes on while driving your Audi S3 and that you also experience a loss of power. In this instance, several trouble can explain its presence. Here is a list of the main motives:

  • Problem of EGR valve, in reality, if you go through a loss of power, it is possible that your EGR valve is clogged, in such a case, it is expected that your preheat light comes on while driving on Audi S3 because it is one of the problem of which it is intended 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 manage the turbo intake pressure, which can bring about turbo boost and a disturbance in the operation of the turbo.
  • Trouble linked 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 disrupt its proper operation.
  • Finally, the last issue that could lead to a glow indicator light on your Audi S3 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 S3

Finally, we’ll give you the motives for a glow plug light that comes on on your Audi S3 without you feeling any difference in power or motor vehicle behaviour. In most cases, this is an electronic problem:

  • Glow plug relays or fuses to be changed, 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 get rid of 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 advise you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

    • To find more tips on the Audi S3, take a look at the Audi S3 category.