A new warning light on your dashboard? You don’t understand why it doesn’t turn off… It’s normal, a car is complicated and there are many factors why a light may come on. In the event that your glow plug light comes on while driving your Toyota Sienna, it may point out several concerns. In this article, we will do everything we can to support you see things more clearly. First, we will discover how the preheating light on your Toyota Sienna works, and then the different motives it lights up when you are driving

glow-plug-light-toyota-sienna

What is the purpose of my Toyota Sienna glow plug light?

The main purpose 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 effectively. Indeed, it must light up when you switch on your Toyota Sienna 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 automobile. However, if it comes on while driving, it may suggest several troubles, we will try to describe the main ones.

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

A glow light that comes on while driving on your Toyota Sienna or at any other time other than when the engine is started is meant to warn you to a problem other than your spark plugs, we will check out this now. No matter the reason, plug in your car to the diagnostic tool will allow you to properly translate the motive for the light up of your glow light.

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

The first probability is that you identify that your glow plug light comes on while driving your Toyota Sienna and that you also encounter a loss of power. In this instance, several trouble can explain its presence. Here is a list of the main factors:

  • Issue of EGR valve, in reality, if you go through a loss of power, it is possible that your EGR valve is clogged, in this case, it is expected that your preheat light comes on while driving on Toyota Sienna because it is one of the issue of which it is expected to warn you. Have the status of your valve looked at
  • Problem related to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can result in turbo boost and a perturbation in the performance of the turbo.
  • Problem associated with the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that disrupt its proper function.
  • Finally, the last issue that could lead to a glow indicator light on your Toyota Sienna coupled with a loss of power, is that your fuel filter is too dirty, you should get 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 Sienna

To finish , we’ll give you the motives for a glow plug light that comes on on your Toyota Sienna without you feeling any difference in power or automobile behaviour. In most cases, this is an electronic problem:

  • Glow plug relays or fuses to be changed, 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 get rid of the issue.
  • You have a false contact somewhere in your electrical circuit, test the other alternatives first because it is not easy to find it alone, we suggest you to go to your technician.
  • Faulty injection pressure sensor, ECU error

    • To discover more tips on the Toyota Sienna, take a look at the Toyota Sienna category.