A new warning light on your dashboard? You don’t find out why it doesn’t shut off… It’s typical, a car is complex and there are various reasons why a light may occur. In cases where your glow plug light comes on while driving your Toyota FJ Cruiser, it might show different things. In this post, we will do everything we can to support you see things more clearly. First, we will find out how the preheating light on your Toyota FJ Cruiser works, and then the different reasons it lights up when you are driving


What is the purpose of my Toyota FJ Cruiser glow plug light?

The primary role of the engine glow plug light, which is generally represented by a yellow coil, is to guarantee that your glow plugs are working correctly. In reality, it must light up when you switch on your Toyota FJ Cruiser 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 meant to stay or come on while driving with your automobile. However, if it turns on while driving, it may indicate multiple failures, we will try to describe the most important ones.

What to do if the glow plug light comes on while driving on my Toyota FJ Cruiser?

A glow light that comes on while driving on your Toyota FJ Cruiser or at any other time other than when the engine is started is meant to notify you to a fault other than your spark plugs, we will take a look at this now. No matter the reason, plug in your car to the diagnostic tool will allow you to precisely interpret the cause for the light up of your glow light.

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

The first probability is that you perceive that your glow plug light comes on while driving your Toyota FJ Cruiser and that you also encounter a loss of power. In this instance, different problems can demonstrate its presence. Here is a list of the most important reasons:

  • Problem of EGR valve, in reality, if you suffer a loss of power, it is possible that your EGR valve is blocked, in such a case, it is obvious that your preheat light comes on while driving on Toyota FJ Cruiser because it is one of the issue of which it is designed to warn 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 cause turbo boost and a perturbation in the performance of the turbo.
  • Issue associated with the injection, either an injector that has seized up or the injection pump that is broken by filings or other possible foreign bodies that disrupt its proper performance.
  • Finally, the last trouble that could lead to a glow indicator light on your Toyota FJ Cruiser 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 Toyota FJ Cruiser

Finally, we’ll give you the reasons for a glow plug light that comes on on your Toyota FJ Cruiser without you feeling any difference in power or automobile behaviour. In general, this is an electronic fault:

  • 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 resolve the trouble.
  • You have a false contact somewhere in your electrical circuit, test the other solutions first because it is not easy to find it alone, we recommend you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error
  • To discover more tips on the Toyota FJ Cruiser, take a look at the Toyota FJ Cruiser category.