A new light on your dashboard? You don’t understand why it doesn’t turn off… It’s typical, a vehicle is elaborate and there are various reasons why a light might come on. In the event that your glow plug light comes on while driving your Mazda 3, it may possibly signal several things. In this article, we will do everything we can to help you see things more clearly. First, we will see how the preheating light on your Mazda 3 operates, and then the different causes it lights up when you are driving

glow-plug-light-mazda-3

What is the goal of my Mazda 3 glow plug light?

The primary goal of the engine glow plug light, which is most of the time 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 Mazda 3 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 supposed to stay or come on while driving with your motor vehicle. However, if it turns on while driving, it may indicate multiple issues, we will try to describe the most important ones.

What to do if the glow plug light comes on while driving on my Mazda 3?

A glow light that comes on while driving on your Mazda 3 or at any other time other than when the engine is started is designed to notify you to a problem other than your spark plugs, we will take a look at this now. In any case, plug in your car to the diagnostic tool will allow you to precisely understand the motive for the light up of your glow light.

My Mazda 3 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 Mazda 3 and that you also experience a loss of power. In this case, several trouble can explain its presence. Here is a list of the most important reasons:

  • Trouble 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 Mazda 3 because it is one of the issue of which it is designed to alert you. Have the status of your valve looked at
  • Trouble associated with the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can lead to turbo boost and a disturbance in the operation of the turbo.
  • Trouble relevant 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 affect its proper function.
  • Finally, the last problem that could lead to a glow indicator light on your Mazda 3 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 Mazda 3

To conclude, we’ll give you the causes for a glow plug light that comes on on your Mazda 3 without you feeling any difference in power or motor vehicle behaviour. Generally, this is an electronic problem:

  • Glow plug relays or fuses to be changed, 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 resolve the problem.
  • You have a false contact somewhere in your electrical circuit, check 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 you wish more guides on the Mazda 3, go to our Mazda 3 category.