A new warning light on your dashboard? You don’t figure out why it doesn’t shut off… It’s normal, a car is complicated and there are multiple factors why a light could occur. In cases where your glow plug light comes on while driving your Fiat Doblo 2, it might signal several problems. On this page, we will do everything we can to support you see things more clearly. First, we will discover how the preheating light on your Fiat Doblo 2 functions, and then the different motives it lights up when you are driving

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What is the goal of my Fiat Doblo 2 glow plug light?

The main role of the engine glow plug light, which is generally represented by a yellow coil, is to guarantee that your glow plugs are working correctly. In fact, it must light up when you switch on your Fiat Doblo 2 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 meant to stay or come on while driving with your vehicle. However, if it turns on while driving, it may suggest several troubles, we will try to detail the most important ones.

What to do if the glow plug light comes on while driving on my Fiat Doblo 2?

A glow light that comes on while driving on your Fiat Doblo 2 or at any other time other than when the engine is started is designed to notify you to a problem other than your spark plugs, we will look at this now. No matter the reason, a switch to the diagnostic tool will allow you to carefully interpret the cause for the light up of your glow light.

My Fiat Doblo 2 glow light comes on and I’m having a loss of power

The first probability is that you notice that your glow plug light comes on while driving your Fiat Doblo 2 and that you also encounter a loss of power. In this case, several trouble can demonstrate its presence. Here is a list of the most important factors:

  • Problem of EGR valve, in fact, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this case, it is obvious that your preheat light comes on while driving on Fiat Doblo 2 because it is one of the failures of which it is supposed to notify you. Have the status of your valve inspected
  • Trouble linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can cause turbo boost and a perturbation in the operation of the turbo.
  • Trouble relevant 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 disrupt its proper function.
  • Finally, the last issue that could lead to a glow indicator light on your Fiat Doblo 2 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 Fiat Doblo 2

Finally, we’ll give you the motives for a glow plug light that comes on on your Fiat Doblo 2 without you feeling any difference in power or vehicle behaviour. In most cases, this is an electronic problem:

  • 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 get rid of the issue.
  • You have a false contact somewhere in your electrical circuit, check the other alternatives first because it is not easy to find it alone, we recommend you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error
  • If you need more tutorials on the Fiat Doblo 2, go to our Fiat Doblo 2 category.