A new light on your dashboard? You don’t understand why it doesn’t shut off… It’s normal, an automobile is complex and there are many reasons why a light could come on. In cases where your glow plug light comes on while driving your Ford C-max, it might suggest some problems. In the following paragraphs, we will do everything we can to support you see things more clearly. First, we will discover how the preheating light on your Ford C-max functions, and then the different motives it lights up when you are driving

glow-plug-light-ford-c-max

What is the role of my Ford C-max glow plug light?

The main intent 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 properly. Indeed, it must light up when you switch on your Ford C-max 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. But, if it comes on while driving, it may indicate multiple issues, we will try to describe the main ones.

What to do if the glow plug light comes on while driving on my Ford C-max?

A glow light that comes on while driving on your Ford C-max or at any other time other than when the engine is started is designed to inform you to a problem other than your spark plugs, we will take a look at this right now. Whatever the case, a switch to the diagnostic tool will allow you to accurately translate the motive for the light up of your glow light.

My Ford C-max glow light comes on and I’m having a loss of power

The first situation is that you notice that your glow plug light comes on while driving your Ford C-max and that you also encounter a loss of power. In this case, some complications can explain its presence. Here is a list of the main reasons:

  • Problem of EGR valve, in fact, if you are affected a loss of power, it is possible that your EGR valve is clogged, in such a case, it is logical that your preheat light comes on while driving on Ford C-max because it is one of the failures of which it is supposed to alert you. Have the status of your valve examined
  • Issue related to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can lead to turbo boost and a perturbation in the operation of the turbo.
  • Issue 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 disrupt its proper functioning.
  • Finally, the last problem that could lead to a glow indicator light on your Ford C-max coupled with a loss of power, is that your fuel filter is too dirty, you should 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 C-max

Finally, we’ll give you the motives for a glow plug light that comes on on your Ford C-max 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 swapped out, 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 problem.
  • 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 auto technician.
  • Faulty injection pressure sensor, ECU error

    • If you need more tutorials on the Ford C-max, go to our Ford C-max category.