A new warning light on your dashboard? You don’t find out why it doesn’t turn off… It’s normal, an auto is complex and there are multiple factors why a light may occur. If it turns out your glow plug light comes on while driving your Chevrolet Cobalt, it may possibly signify several problems. On this page, we will do anything we can to help you see things more clearly. First, we will discover how the preheating light on your Chevrolet Cobalt functions, and then the different reasons it lights up when you are driving

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What is the role of my Chevrolet Cobalt glow plug light?

The primary intent of the engine glow plug light, which is most of the time represented by a yellow coil, is to ensure that your glow plugs are working correctly. Indeed, it must light up when you switch on your Chevrolet Cobalt 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 expected to stay or come on while driving with your automobile. But, if it comes on while driving, it may reveal several issues, we will try to point out the most important ones.

What to do if the glow plug light comes on while driving on my Chevrolet Cobalt?

A glow light that comes on while driving on your Chevrolet Cobalt 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 now. No matter the reason, connecting your vehicle to the diagnostic tool will allow you to accurately understand the cause for the light up of your glow light.

My Chevrolet Cobalt glow light comes on and I’m experiencing a loss of power

The first possibility is that you notice that your glow plug light comes on while driving your Chevrolet Cobalt and that you also encounter a loss of power. In this instance, several concerns can demonstrate its lightning. Here is a list of the most important factors:

  • Trouble 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 Chevrolet Cobalt because it is one of the issue of which it is designed to notify you. Have the status of your valve checked out
  • Trouble related to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can cause turbo boost and a disturbance in the performance of the turbo.
  • Trouble linked 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 disturb its proper operation.
  • Finally, the last problem that could lead to a glow indicator light on your Chevrolet Cobalt coupled with a loss of power, is that your fuel filter is too dirty, you should encounter 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 Chevrolet Cobalt

To finish , we’ll give you the reasons for a glow plug light that comes on on your Chevrolet Cobalt without you feeling any difference in power or automobile 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 solve the problem.
  • 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 technician.
  • Faulty injection pressure sensor, ECU error

    • To get more tips on the Chevrolet Cobalt, take a look at the Chevrolet Cobalt category.