A new warning light on your dashboard? You don’t find out why it doesn’t switch off… It’s typical, a vehicle is complicated and there are many factors why a light might occur. In the event that your glow plug light comes on while driving your Alfa Romeo 156, it might indicate several concerns. In this post, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Alfa Romeo 156 functions, and then the different causes it lights up when you are driving

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What is the goal of my Alfa Romeo 156 glow plug light?

The main purpose of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to guarantee that your glow plugs are working effectively. In reality, it must light up when you switch on your Alfa Romeo 156 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 vehicle. Nevertheless, if it comes on while driving, it may reveal several failures, we will try to describe the most important ones.

What to do if the glow plug light comes on while driving on my Alfa Romeo 156?

A glow light that comes on while driving on your Alfa Romeo 156 or at any other time other than when the engine is started is intended to alert you to a fault other than your spark plugs, we will take a look at this now. Whatever the case, a switch to the diagnostic tool will allow you to properly interpret the explanation for the light up of your glow light.

My Alfa Romeo 156 glow light comes on and I’m going through a loss of power

The first situation is that you identify that your glow plug light comes on while driving your Alfa Romeo 156 and that you also knowledge a loss of power. In this case, several concerns can demonstrate its presence. Here is a list of the most important factors:

  • Trouble of EGR valve, in fact, if you suffer a loss of power, it is possible that your EGR valve is clogged, in this instance, it is logical that your preheat light comes on while driving on Alfa Romeo 156 because it is one of the issue of which it is meant to notify you. Have the status of your valve looked at
  • Trouble linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can result in turbo boost and a disturbance in the performance of the turbo.
  • Trouble related to the injection, either an injector that has seized up or the injection pump that is malfunctioned by filings or other possible foreign bodies that disrupt its proper functioning.
  • Finally, the last issue that could lead to a glow indicator light on your Alfa Romeo 156 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 Alfa Romeo 156

To conclude, we’ll give you the causes for a glow plug light that comes on on your Alfa Romeo 156 without you feeling any difference in power or vehicle behaviour. In general, 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 issue.
  • 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 recommend you to go to your technician.
  • Faulty injection pressure sensor, ECU error

    • If you wish more guides on the Alfa Romeo 156, go to our Alfa Romeo 156 category.