A new warning light on your dashboard? You don’t figure out why it doesn’t shut off… It’s normal, an automobile is complicated and there are many reasons why a light may come on. If it turns out your glow plug light comes on while driving your Ford Fiesta 4, it may possibly signify different problems. In this post, we will do everything we can to support you see things more clearly. First, we will see how the preheating light on your Ford Fiesta 4 operates, and then the different motives it lights up when you are driving

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What is the purpose of my Ford Fiesta 4 glow plug light?

The primary role of the engine glow plug light, which is in most cases symbolized 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 Ford Fiesta 4 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 motor vehicle. Nevertheless, if it turns on while driving, it may show different troubles, we will try to describe the most important ones.

What to do if the glow plug light comes on while driving on my Ford Fiesta 4?

A glow light that comes on while driving on your Ford Fiesta 4 or at any other time other than when the engine is started is intended to inform you to a fault other than your spark plugs, we will take a look at this right now. In any case, connecting your vehicle to the diagnostic tool will allow you to carefully translate the motive for the light up of your glow light.

My Ford Fiesta 4 glow light comes on and I’m encountering a loss of power

The first probability is that you perceive that your glow plug light comes on while driving your Ford Fiesta 4 and that you also experience a loss of power. In this case, different trouble can explain its presence. Here is a list of the most important reasons:

  • Problem of EGR valve, in reality, if you are affected a loss of power, it is possible that your EGR valve is blocked, in such a case, it is logical that your preheat light comes on while driving on Ford Fiesta 4 because it is one of the problem of which it is designed to alert you. Have the status of your valve tested
  • Issue related to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can cause turbo boost and a disturbance in the performance of the turbo.
  • Issue linked 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 disturb its proper performing.
  • Finally, the last trouble that could lead to a glow indicator light on your Ford Fiesta 4 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 Ford Fiesta 4

Finally, we’ll give you the motives for a glow plug light that comes on on your Ford Fiesta 4 without you feeling any difference in power or motor vehicle behaviour. In most cases, this is an electronic fault:

  • 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 trouble.
  • You have a false contact somewhere in your electrical circuit, test out the other options first because it is not easy to find it alone, we encourage you to go to your technician.
  • Faulty injection pressure sensor, ECU error
  • Whenever you have any additional questions about the Ford Fiesta 4, do not hesitate to consult our Ford Fiesta 4 category.