A new warning light on your dashboard? You don’t understand why it doesn’t turn off… It’s typical, an automobile is complex and there are many factors why a light could come on. In cases where your glow plug light comes on while driving your Jeep Liberty, it may signify several things. In the following paragraphs, we will do everything we can to support you see things more clearly. First, we will see how the preheating light on your Jeep Liberty functions, and then the different motives it lights up when you are driving

glow-plug-light-jeep-liberty

What is the goal of my Jeep Liberty glow plug light?

The main intent of the engine glow plug light, which is most of the time represented by a yellow coil, is to guarantee that your glow plugs are working properly. In reality, it must light up when you switch on your Jeep Liberty 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 motor vehicle. However, if it comes on while driving, it may reveal different issues, we will try to describe the most important ones.

What to do if the glow plug light comes on while driving on my Jeep Liberty?

A glow light that comes on while driving on your Jeep Liberty or at any other time other than when the engine is started is intended to notify you to a problem other than your spark plugs, we will take a look at this now. In any case, connecting your vehicle to the diagnostic tool will allow you to carefully understand the motive for the light up of your glow light.

My Jeep Liberty glow light comes on and I’m going through a loss of power

The first situation is that you recognize that your glow plug light comes on while driving your Jeep Liberty and that you also knowledge a loss of power. In such a case, several concerns can explain its presence. Here is a list of the most important factors:

  • Trouble of EGR valve, indeed, if you undergo a loss of power, it is possible that your EGR valve is blocked, in this case, it is rational that your preheat light comes on while driving on Jeep Liberty because it is one of the problem of which it is designed to alert you. Have the status of your valve checked
  • Problem 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 perturbation in the operation of the turbo.
  • Problem in connection 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 operation.
  • Finally, the last issue that could lead to a glow indicator light on your Jeep Liberty 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 Jeep Liberty

Finally, we’ll give you the motives for a glow plug light that comes on on your Jeep Liberty without you feeling any difference in power or motor vehicle behaviour. Generally, 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, test out the other alternatives first because it is not easy to find it alone, we advise you to go to your technician.
  • Faulty injection pressure sensor, ECU error

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