A new light on your dashboard? You don’t find out why it doesn’t turn off… It’s typical, an auto is complicated and there are various motives why a light might come on. If it turns out your glow plug light comes on while driving your Mazda MX 5 Miata, it may possibly point out several problems. On this page, we will do everything we can to help you see things more clearly. First, we will see how the preheating light on your Mazda MX 5 Miata works, and then the different explanations it lights up when you are driving

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

The primary purpose of the engine glow plug light, which is generally represented by a yellow coil, is to assure that your glow plugs are working properly. In reality, it must light up when you switch on your Mazda MX 5 Miata 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 meant to stay or come on while driving with your automobile. However, if it turns on while driving, it may suggest different troubles, we will try to explain the most important ones.

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

A glow light that comes on while driving on your Mazda MX 5 Miata 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 take a look at this now. No matter the reason, a switch to the diagnostic tool will allow you to properly interpret the reason for the light up of your glow light.

My Mazda MX 5 Miata glow light comes on and I’m suffering from a loss of power

The first situation is that you notice that your glow plug light comes on while driving your Mazda MX 5 Miata and that you also knowledge a loss of power. In this case, several complications can explain its presence. Here is a list of the most important motives:

  • Problem of EGR valve, in fact, if you undergo 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 MX 5 Miata because it is one of the issue of which it is intended to warn you. Have the status of your valve examined
  • Issue associated with 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 perturbation in the performance of the turbo.
  • Issue 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 performance.
  • Finally, the last trouble that could lead to a glow indicator light on your Mazda MX 5 Miata coupled with a loss of power, is that your fuel filter is too dirty, you should experience 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 MX 5 Miata

To conclude, we’ll give you the explanations for a glow plug light that comes on on your Mazda MX 5 Miata without you feeling any difference in power or automobile behaviour. In general, this is an electronic problem:

  • 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 fix the trouble.
  • 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 suggest you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • To find more tips on the Mazda MX 5 Miata, take a look at the Mazda MX 5 Miata category.