A new light on your dashboard? You don’t understand why it doesn’t turn off… It’s normal, an automobile is complicated and there are various motives why a light may occur. If your glow plug light comes on while driving your Toyota Rav 4, it may possibly indicate several issues. In this post, we will do anything we can to support you see things more clearly. First, we will find out how the preheating light on your Toyota Rav 4 operates, and then the different reasons it lights up when you are driving

glow-plug-light-toyota-rav-4

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

The primary intent of the engine glow plug light, which is in most cases 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 Toyota Rav 4 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 car. Nevertheless, if it comes on while driving, it may suggest different troubles, we will try to detail the most important ones.

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

A glow light that comes on while driving on your Toyota Rav 4 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, plug in your car to the diagnostic tool will allow you to precisely translate the explanation for the light up of your glow light.

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

The first situation is that you identify that your glow plug light comes on while driving your Toyota Rav 4 and that you also encounter a loss of power. In this case, several concerns can describe its presence. Here is a list of the most important motives:

  • Problem of EGR valve, indeed, if you go through a loss of power, it is possible that your EGR valve is blocked, in such a case, it is expected that your preheat light comes on while driving on Toyota Rav 4 because it is one of the failures of which it is intended to warn you. Have the status of your valve inspected
  • Trouble associated with the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can bring about turbo boost and a perturbation in the performance of the turbo.
  • Trouble linked 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 issue that could lead to a glow indicator light on your Toyota Rav 4 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 Toyota Rav 4

Finally, we’ll give you the reasons for a glow plug light that comes on on your Toyota Rav 4 without you feeling any difference in power or car 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 issue.
  • You have a false contact somewhere in your electrical circuit, test out the other alternatives first because it is not easy to find it alone, we advise you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error
  • To discover more tips on the Toyota Rav 4, take a look at the Toyota Rav 4 category.