A new light on your dashboard? You don’t find out why it doesn’t turn off… It’s normal, an automobile is complex and there are multiple factors why a light might come on. If it turns out your glow plug light comes on while driving your Ford F 450, it may possibly indicate several problems. In this post, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Ford F 450 works, and then the different explanations it lights up when you are driving

glow-plug-light-ford-f-450

What is the purpose of my Ford F 450 glow plug light?

The primary goal of the engine glow plug light, which is in most cases represented by a yellow coil, is to ensure that your glow plugs are working correctly. In fact, it must light up when you switch on your Ford F 450 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. However, if it comes on while driving, it may show several troubles, we will try to summarize the main ones.

What to do if the glow plug light comes on while driving on my Ford F 450?

A glow light that comes on while driving on your Ford F 450 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 look at this right now. No matter the reason, a switch to the diagnostic tool will allow you to accurately understand the cause for the light up of your glow light.

My Ford F 450 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 F 450 and that you also encounter a loss of power. In such a case, several complications can demonstrate its presence. Here is a list of the main factors:

  • Trouble of EGR valve, in fact, if you suffer a loss of power, it is possible that your EGR valve is clogged, in this instance, it is expected that your preheat light comes on while driving on Ford F 450 because it is one of the failures of which it is designed to alert you. Have the status of your valve tested
  • 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 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 destroyed by filings or other possible foreign bodies that disturb its proper performance.
  • Finally, the last issue that could lead to a glow indicator light on your Ford F 450 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 F 450

Finally, we’ll give you the explanations for a glow plug light that comes on on your Ford F 450 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 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 solve the issue.
  • 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 repair shop.
  • Faulty injection pressure sensor, ECU error

    • If you wish more tutorials on the Ford F 450, go to our Ford F 450 category.