A new warning light on your dashboard? You don’t understand why it doesn’t shut off… It’s normal, an auto is complicated and there are many reasons why a light may come on. In cases where your glow plug light comes on while driving your Mercedes Sprinter, it may indicate several concerns. On this page, we will do everything we can to support you see things more clearly. First, we will see how the preheating light on your Mercedes Sprinter functions, and then the different causes it lights up when you are driving

glow-plug-light-mercedes-sprinter

What is the goal of my Mercedes Sprinter glow plug light?

The primary purpose of the engine glow plug light, which is in most cases represented by a yellow coil, is to ensure that your glow plugs are working properly. Indeed, it must light up when you switch on your Mercedes Sprinter 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 meant to stay or come on while driving with your vehicle. But, if it turns on while driving, it may suggest multiple failures, we will try to detail the main ones.

What to do if the glow plug light comes on while driving on my Mercedes Sprinter?

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

My Mercedes Sprinter glow light comes on and I’m suffering from a loss of power

The first situation is that you notice that your glow plug light comes on while driving your Mercedes Sprinter and that you also encounter a loss of power. In such a case, several concerns can demonstrate its lightning. Here is a list of the main reasons:

  • Issue of EGR valve, in reality, if you go through a loss of power, it is possible that your EGR valve is blocked, in this instance, it is obvious that your preheat light comes on while driving on Mercedes Sprinter because it is one of the problem of which it is intended to notify you. Have the status of your valve looked at
  • Trouble associated with the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can bring about turbo boost and a disturbance in the operation of the turbo.
  • Trouble relevant 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 function.
  • Finally, the last issue that could lead to a glow indicator light on your Mercedes Sprinter coupled with a loss of power, is that your fuel filter is too dirty, you should 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 Mercedes Sprinter

Finally, we’ll give you the causes for a glow plug light that comes on on your Mercedes Sprinter 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 resolve the issue.
  • You have a false contact somewhere in your electrical circuit, check the other options first because it is not easy to find it alone, we encourage you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • If you have any further questions about the Mercedes Sprinter, do not hesitate to consult our Mercedes Sprinter category.