A new warning light on your dashboard? You don’t find out why it doesn’t turn off… It’s normal, an auto is complicated and there are various causes why a light might come on. If it turns out your glow plug light comes on while driving your Toyota C-hr, it may possibly suggest some things. In the following paragraphs, we will do anything we can to support you see things more clearly. First, we will see how the preheating light on your Toyota C-hr works, and then the different reasons it lights up when you are driving

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What is the purpose of my Toyota C-hr glow plug light?

The main role of the engine glow plug light, which is generally represented by a yellow coil, is to ensure that your glow plugs are working properly. In reality, it must light up when you switch on your Toyota C-hr 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 expected to stay or come on while driving with your car. Nevertheless, if it turns on while driving, it may indicate several failures, we will try to detail the most important ones.

What to do if the glow plug light comes on while driving on my Toyota C-hr?

A glow light that comes on while driving on your Toyota C-hr or at any other time other than when the engine is started is designed to notify you to a fault other than your spark plugs, we will look at this now. No matter the reason, connecting your vehicle to the diagnostic tool will allow you to carefully interpret the explanation for the light up of your glow light.

My Toyota C-hr glow light comes on and I’m encountering a loss of power

The first possibility is that you recognize that your glow plug light comes on while driving your Toyota C-hr and that you also knowledge a loss of power. In this instance, some concerns can demonstrate its presence. Here is a list of the most important causes:

  • Issue of EGR valve, in fact, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this case, it is obvious that your preheat light comes on while driving on Toyota C-hr because it is one of the failures of which it is expected to notify you. Have the status of your valve checked
  • Trouble related to 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 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 C-hr 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 C-hr

Finally, we’ll give you the reasons for a glow plug light that comes on on your Toyota C-hr 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 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 solve the issue.
  • 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 encourage you to go to your technician.
  • Faulty injection pressure sensor, ECU error
  • If perhaps you have any further questions about the Toyota C-hr, do not hesitate to consult our Toyota C-hr category.