A new light on your dashboard? You don’t understand why it doesn’t shut off… It’s normal, an auto is complicated and there are many reasons why a light may come on. In the event that your glow plug light comes on while driving your Mazda 5, it may signify some issues. In the following paragraphs, we will do anything we can to support you see things more clearly. First, we will discover how the preheating light on your Mazda 5 functions, and then the different causes it lights up when you are driving

glow-plug-light-mazda-5

What is the goal of my Mazda 5 glow plug light?

The main intent of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to assure that your glow plugs are working correctly. Indeed, it must light up when you switch on your Mazda 5 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 motor vehicle. Nevertheless, if it turns on while driving, it may suggest multiple failures, we will try to describe the main ones.

What to do if the glow plug light comes on while driving on my Mazda 5?

A glow light that comes on while driving on your Mazda 5 or at any other time other than when the engine is started is meant to alert you to a fault other than your spark plugs, we will check out this right now. In any case, plug in your car to the diagnostic tool will allow you to carefully interpret the reason for the light up of your glow light.

My Mazda 5 glow light comes on and I’m going through a loss of power

The first possibility is that you identify that your glow plug light comes on while driving your Mazda 5 and that you also encounter a loss of power. In this instance, some problems can describe its presence. Here is a list of the main reasons:

  • Trouble of EGR valve, in reality, if you are affected a loss of power, it is possible that your EGR valve is blocked, in this case, it is logical that your preheat light comes on while driving on Mazda 5 because it is one of the issue of which it is intended to warn you. Have the status of your valve checked
  • Trouble related to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can lead to turbo boost and a disturbance in the operation of the turbo.
  • Trouble related to the injection, either an injector that has seized up or the injection pump that is malfunctioned by filings or other possible foreign bodies that disrupt its proper function.
  • Finally, the last trouble that could lead to a glow indicator light on your Mazda 5 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 Mazda 5

To finish , we’ll give you the causes for a glow plug light that comes on on your Mazda 5 without you feeling any difference in power or motor vehicle behaviour. In general, this is an electronic fault:

  • Glow plug relays or fuses to be swapped out, 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 fix the trouble.
  • You have a false contact somewhere in your electrical circuit, check the other options first because it is not easy to find it alone, we recommend you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • If you have any further questions about the Mazda 5, do not hesitate to consult our Mazda 5 category.