A new warning light on your dashboard? You don’t understand why it doesn’t switch off… It’s typical, an automobile is elaborate and there are many causes why a light could occur. In cases where your glow plug light comes on while driving your Ford Fiesta, it may signify different problems. In this article, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Ford Fiesta functions, and then the different reasons it lights up when you are driving


What is the goal of my Ford Fiesta glow plug light?

The main role of the engine glow plug light, which is generally represented by a yellow coil, is to ensure that your glow plugs are working effectively. In reality, it must light up when you switch on your Ford Fiesta 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 car. But, if it comes on while driving, it may indicate several issues, we will try to point out the most important ones.

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

A glow light that comes on while driving on your Ford Fiesta or at any other time other than when the engine is started is designed to notify you to a fault 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 translate the motive for the light up of your glow light.

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

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

  • Trouble of EGR valve, in fact, if you are affected a loss of power, it is possible that your EGR valve is blocked, in this case, it is rational that your preheat light comes on while driving on Ford Fiesta because it is one of the problem of which it is meant to notify you. Have the status of your valve inspected
  • Problem associated with the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can cause turbo boost and a perturbation in the operation of the turbo.
  • Problem associated with 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 function.
  • Finally, the last trouble that could lead to a glow indicator light on your Ford Fiesta 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 Ford Fiesta

To conclude, we’ll give you the reasons for a glow plug light that comes on on your Ford Fiesta without you feeling any difference in power or car behaviour. Ordinarily, this is an electronic fault:

  • Glow plug relays or fuses to be replaced, 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 resolve 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 suggest you to go to your technician.
  • Faulty injection pressure sensor, ECU error
  • To get more tips on the Ford Fiesta, take a look at the Ford Fiesta category.