A new warning light on your dashboard? You don’t understand why it doesn’t turn off… It’s normal, an automobile is elaborate and there are various factors why a light could come on. In the event that your glow plug light comes on while driving your Ford S-max, it might show several concerns. On this page, we will do everything we can to help you see things more clearly. First, we will see how the preheating light on your Ford S-max functions, and then the different explanations it lights up when you are driving

glow-plug-light-ford-s-max

What is the goal of my Ford S-max glow plug light?

The main purpose of the engine glow plug light, which is most of the time represented by a yellow coil, is to make sure that your glow plugs are working properly. Indeed, it must light up when you switch on your Ford S-max 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 automobile. However, if it comes on while driving, it may indicate different failures, we will try to detail the main ones.

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

A glow light that comes on while driving on your Ford S-max or at any other time other than when the engine is started is intended to notify you to a fault other than your spark plugs, we will look at this now. No matter the reason, a switch to the diagnostic tool will allow you to carefully understand the cause for the light up of your glow light.

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

The first situation is that you perceive that your glow plug light comes on while driving your Ford S-max and that you also knowledge a loss of power. In this case, several trouble can describe its presence. Here is a list of the main factors:

  • Trouble of EGR valve, indeed, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this instance, it is logical that your preheat light comes on while driving on Ford S-max because it is one of the issue of which it is designed to notify you. Have the status of your valve examined
  • Trouble 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 perturbation in the performance of the turbo.
  • Trouble relevant 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 operation.
  • Finally, the last problem that could lead to a glow indicator light on your Ford S-max coupled with a loss of power, is that your fuel filter is too dirty, you should experience 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 S-max

To finish , we’ll give you the explanations for a glow plug light that comes on on your Ford S-max without you feeling any difference in power or automobile behaviour. In most cases, 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 solve 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 recommend you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • In the event that you have any further questions about the Ford S-max, do not hesitate to consult our Ford S-max category.