A new warning light on your dashboard? You don’t understand why it doesn’t switch off… It’s typical, a vehicle is elaborate and there are many factors why a light may occur. In the event that your glow plug light comes on while driving your Mazda CX 5, it might signal some problems. In this post, we will do everything we can to help you see things more clearly. First, we will find out how the preheating light on your Mazda CX 5 operates, and then the different explanations it lights up when you are driving

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

The main role of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to ensure that your glow plugs are working effectively. In fact, it must light up when you switch on your Mazda CX 5 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. Nevertheless, if it comes on while driving, it may show multiple failures, we will try to explain the most important ones.

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

A glow light that comes on while driving on your Mazda CX 5 or at any other time other than when the engine is started is designed to inform you to a fault other than your spark plugs, we will check out this now. No matter the reason, connecting your vehicle to the diagnostic tool will allow you to properly translate the reason for the light up of your glow light.

My Mazda CX 5 glow light comes on and I’m having a loss of power

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

  • Trouble of EGR valve, in reality, if you suffer a loss of power, it is possible that your EGR valve is clogged, in this instance, it is expected that your preheat light comes on while driving on Mazda CX 5 because it is one of the failures of which it is intended to warn you. Have the status of your valve inspected
  • Problem related to 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 perturbation in the performance of the turbo.
  • Problem in connection with the injection, either an injector that has seized up or the injection pump that is damaged by filings or other possible foreign bodies that affect its proper function.
  • Finally, the last trouble that could lead to a glow indicator light on your Mazda CX 5 coupled with a loss of power, is that your fuel filter is too dirty, you should come to 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 CX 5

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

  • 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 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 advise you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

    • In the event that you have any further questions about the Mazda CX 5, do not hesitate to consult our Mazda CX 5 category.