A new warning light on your dashboard? You don’t find out why it doesn’t turn off… It’s normal, a vehicle is complex and there are many reasons why a light may come on. If your glow plug light comes on while driving your Fiat 500X, it may show some concerns. On this page, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Fiat 500X operates, and then the different motives it lights up when you are driving


What is the role of my Fiat 500X glow plug light?

The primary goal 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 Fiat 500X 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 expected to stay or come on while driving with your motor vehicle. But, if it comes on while driving, it may show several issues, we will try to summarize the main ones.

What to do if the glow plug light comes on while driving on my Fiat 500X?

A glow light that comes on while driving on your Fiat 500X or at any other time other than when the engine is started is designed to inform you to a fault other than your spark plugs, we will take a look at this now. Whatever the case, plug in your car to the diagnostic tool will allow you to accurately interpret the reason for the light up of your glow light.

My Fiat 500X glow light comes on and I’m having a loss of power

The first probability is that you identify that your glow plug light comes on while driving your Fiat 500X and that you also experience a loss of power. In this case, some problems can explain its lightning. Here is a list of the main reasons:

  • Issue of EGR valve, in fact, if you undergo a loss of power, it is possible that your EGR valve is clogged, in such a case, it is obvious that your preheat light comes on while driving on Fiat 500X because it is one of the problem of which it is meant to warn you. Have the status of your valve inspected
  • Trouble linked 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 performance of the turbo.
  • Trouble related to the injection, either an injector that has seized up or the injection pump that is destroyed 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 Fiat 500X 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 Fiat 500X

To conclude, we’ll give you the motives for a glow plug light that comes on on your Fiat 500X without you feeling any difference in power or motor vehicle behaviour. Ordinarily, 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 resolve the trouble.
  • You have a false contact somewhere in your electrical circuit, test the other options first because it is not easy to find it alone, we encourage you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error
  • If you need more guides on the Fiat 500X, go to our Fiat 500X category.