A new light on your dashboard? You don’t figure out why it doesn’t turn off… It’s typical, an automobile is complex and there are many reasons why a light could come on. If it turns out your glow plug light comes on while driving your Mazda CX 7, it may reveal several things. In the following paragraphs, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Mazda CX 7 functions, and then the different motives it lights up when you are driving

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What is the purpose of my Mazda CX 7 glow plug light?

The primary role of the engine glow plug light, which is generally represented by a yellow coil, is to guarantee that your glow plugs are working effectively. Indeed, it must light up when you switch on your Mazda CX 7 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 supposed to stay or come on while driving with your car. However, if it comes on while driving, it may show different failures, we will try to point out the most important ones.

What to do if the glow plug light comes on while driving on my Mazda CX 7?

A glow light that comes on while driving on your Mazda CX 7 or at any other time other than when the engine is started is intended to notify you to a fault other than your spark plugs, we will check out this right now. Whatever the case, connecting your vehicle to the diagnostic tool will allow you to accurately interpret the explanation for the light up of your glow light.

My Mazda CX 7 glow light comes on and I’m encountering a loss of power

The first probability is that you perceive that your glow plug light comes on while driving your Mazda CX 7 and that you also knowledge a loss of power. In such a case, several complications can describe its lightning. Here is a list of the most important reasons:

  • Trouble of EGR valve, in fact, if you undergo a loss of power, it is possible that your EGR valve is clogged, in this instance, it is rational that your preheat light comes on while driving on Mazda CX 7 because it is one of the problem of which it is meant to warn you. Have the status of your valve inspected
  • Problem linked to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can result in turbo boost and a disturbance in the operation of the turbo.
  • Problem associated with the injection, either an injector that has seized up or the injection pump that is broken by filings or other possible foreign bodies that affect its proper functioning.
  • Finally, the last issue that could lead to a glow indicator light on your Mazda CX 7 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 CX 7

Finally, we’ll give you the motives for a glow plug light that comes on on your Mazda CX 7 without you feeling any difference in power or car behaviour. In general, this is an electronic fault:

  • Glow plug relays or fuses to be replaced, 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 issue.
  • 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 encourage you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • If perhaps you have any further questions about the Mazda CX 7, do not hesitate to consult our Mazda CX 7 category.