A new light on your dashboard? You don’t find out why it doesn’t shut off… It’s normal, an auto is complex and there are various causes why a light may come on. If your glow plug light comes on while driving your Ford F 250, it might point out some concerns. In this article, we will do anything we can to help you see things more clearly. First, we will find out how the preheating light on your Ford F 250 works, and then the different reasons it lights up when you are driving

glow-plug-light-ford-f-250

What is the purpose of my Ford F 250 glow plug light?

The main purpose of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to make sure that your glow plugs are working correctly. In fact, it must light up when you switch on your Ford F 250 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. Nevertheless, if it comes on while driving, it may indicate multiple troubles, 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 F 250?

A glow light that comes on while driving on your Ford F 250 or at any other time other than when the engine is started is designed to warn you to a fault other than your spark plugs, we will take a look at this right now. No matter the reason, connecting your vehicle to the diagnostic tool will allow you to accurately translate the motive for the light up of your glow light.

My Ford F 250 glow light comes on and I’m experiencing a loss of power

The first possibility is that you perceive that your glow plug light comes on while driving your Ford F 250 and that you also encounter a loss of power. In this instance, some concerns can explain its presence. Here is a list of the most important causes:

  • Problem of EGR valve, indeed, if you undergo a loss of power, it is possible that your EGR valve is clogged, in such a case, it is expected that your preheat light comes on while driving on Ford F 250 because it is one of the problem of which it is supposed to alert you. Have the status of your valve inspected
  • Problem 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 disturbance in the performance of the turbo.
  • Problem relevant to the injection, either an injector that has seized up or the injection pump that is broken by filings or other possible foreign bodies that disturb its proper function.
  • Finally, the last problem that could lead to a glow indicator light on your Ford F 250 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 F 250

To conclude, we’ll give you the reasons for a glow plug light that comes on on your Ford F 250 without you feeling any difference in power or car behaviour. In general, 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 fix the problem.
  • 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 mechanic.
  • Faulty injection pressure sensor, ECU error
  • If you wish more tutorials on the Ford F 250, go to our Ford F 250 category.