A new light on your dashboard? You don’t find out why it doesn’t switch off… It’s typical, a vehicle is complex and there are multiple factors why a light could come on. In the event that your glow plug light comes on while driving your Toyota 4Runner, it might signify different issues. In this article, we will do anything we can to support you see things more clearly. First, we will see how the preheating light on your Toyota 4Runner functions, and then the different explanations it lights up when you are driving

glow-plug-light-toyota-4runner

What is the role of my Toyota 4Runner glow plug light?

The primary intent 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 effectively. Indeed, it must light up when you switch on your Toyota 4Runner 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 expected to stay or come on while driving with your automobile. But, if it comes on while driving, it may reveal different failures, we will try to detail the main ones.

What to do if the glow plug light comes on while driving on my Toyota 4Runner?

A glow light that comes on while driving on your Toyota 4Runner or at any other time other than when the engine is started is intended to notify you to a problem other than your spark plugs, we will check out this now. Whatever the case, connecting your vehicle to the diagnostic tool will allow you to accurately translate the explanation for the light up of your glow light.

My Toyota 4Runner glow light comes on and I’m going through a loss of power

The first situation is that you perceive that your glow plug light comes on while driving your Toyota 4Runner and that you also experience a loss of power. In this case, different trouble can explain its presence. Here is a list of the main factors:

  • Trouble of EGR valve, in reality, if you suffer 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 Toyota 4Runner because it is one of the problem of which it is supposed to notify you. Have the status of your valve looked at
  • Issue related to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can cause turbo boost and a disturbance in the operation of the turbo.
  • Issue associated with the injection, either an injector that has seized up or the injection pump that is malfunctioned by filings or other possible foreign bodies that affect its proper performing.
  • Finally, the last trouble that could lead to a glow indicator light on your Toyota 4Runner 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 Toyota 4Runner

Finally, we’ll give you the explanations for a glow plug light that comes on on your Toyota 4Runner without you feeling any difference in power or automobile behaviour. Ordinarily, 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 get rid of the trouble.
  • You have a false contact somewhere in your electrical circuit, check the other options first because it is not easy to find it alone, we suggest you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

    • In the event that you have any additional questions about the Toyota 4Runner, do not hesitate to consult our Toyota 4Runner category.