A new light on your dashboard? You don’t find out why it doesn’t turn off… It’s typical, a car is complex and there are various causes why a light could come on. In cases where your glow plug light comes on while driving your Mazda CX 30, it might point out some concerns. In this post, we will do everything we can to help you see things more clearly. First, we will see how the preheating light on your Mazda CX 30 functions, and then the different explanations it lights up when you are driving

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What is the purpose of my Mazda CX 30 glow plug light?

The main role of the engine glow plug light, which is in most cases represented by a yellow coil, is to make sure that your glow plugs are working properly. In fact, it must light up when you switch on your Mazda CX 30 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 car. But, if it comes on while driving, it may indicate different troubles, 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 30?

A glow light that comes on while driving on your Mazda CX 30 or at any other time other than when the engine is started is meant to inform you to a fault other than your spark plugs, we will look at this right now. In any case, a switch to the diagnostic tool will allow you to carefully interpret the explanation for the light up of your glow light.

My Mazda CX 30 glow light comes on and I’m experiencing a loss of power

The first situation is that you recognize that your glow plug light comes on while driving your Mazda CX 30 and that you also knowledge a loss of power. In such a case, some problems can demonstrate its lightning. Here is a list of the most important causes:

  • Problem of EGR valve, in reality, if you go through 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 30 because it is one of the issue of which it is designed to alert you. Have the status of your valve inspected
  • Trouble related 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 perturbation in the operation of the turbo.
  • Trouble associated 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 disrupt its proper operation.
  • Finally, the last trouble that could lead to a glow indicator light on your Mazda CX 30 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 30

To conclude, we’ll give you the explanations for a glow plug light that comes on on your Mazda CX 30 without you feeling any difference in power or car behaviour. Generally, 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 solve the trouble.
  • You have a false contact somewhere in your electrical circuit, test the other alternatives 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

    • Whenever you have any additional questions about the Mazda CX 30, do not hesitate to consult our Mazda CX 30 category.