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The dashboard of our cars has a series of lights that warns us of any status changes or malfunctions in the car. We can say for certain that every person, including you and us, is ignoring at least one of the warning lights this very minute. But the focus of this article is the Engine Management Light on the Nissan Juke.
There are several reasons why the engine management light would switch on in your Nissan Juke. This could indicate some mild concerns like problems with the emissions control systems or a loose gas cap. But other times, it may be something dangerous like an overheating catalytic converter that may damage the engine.
This article will discuss the possible reasons that the warning is switched on. So, read on to find out if you need to be worried or not.
Can I drive my Nissan Juke if the engine management light is on?
The engine management light in your Nissan Juke shows up in 3 different ways. Depending on its mode, the severity of the situation can be assessed. The least concerning mode is when you see the light switch on during normal driving with no decrease in performance. This means there is probably something minor wrong with the car and you can get it checked at your leisure.
Secondly, you might see the light is on and there is a significant decrease in performance. This significant decrease in performance is known as “security mode” or “limp-home mode” sometimes. It is named so because the purpose of it is to prevent your car from incurring further damage while allowing you to retain its functionality. Thus, there is a significant problem with your car, but you are not in any immediate danger. The course of action, in this case, is to drive your car straight home or to the nearest dealership to get a proper assessment done immediately.
Finally, the third mode is when you see the check engine light blinking continuously. This means something serious is wrong with the car. Pull over immediately and call for assistance from the nearest on-road service. This is usually caused due to an overheated catalytic converter and is at risk of blowing up.
Time to find out what could cause these warnings in your Juke.
Possible causes for Nissan Juke’s engine management light
Before moving into the causes, it is important to understand that the “check engine light” or “engine management light” is referred to as the “Malfunction Indicator Light (MIL)” in a Nissan Juke. Thus, if you see this sign pop up, the list of possible causes remains the same.
The check engine light can be triggered by a few fuel-related problems too. One of the main ones is the lack of fuel to enable combustion. If you see that your fuel level is well over the empty mark, then there is something wrong with the fuel pump.
Another possible issue can be the fuel injectors not injecting fuel properly. This can be caused either due to a problem in the injector itself (such as a leak or blockage) or the fuel pump not being able to generate enough pressure.
Leaving your gas cap loose after refueling is a simple rookie mistake. Probably every one of us has done it at least once while trying to refuel our cars. If this is the cause, then just stepping out, and closing it firmly should take care of the alarm. The only problems it can cause are the evaporation of fuel and possible contamination of it. Nothing too major to worry about.
Weirdly enough, the wrong type of fuel can also cause the error on your Nissan juke to light up. This is commonly seen when you move from one region to another which uses a higher percentage of ethanol/methanol blend than recommended by the company. If you flush out the old fuel and add the right one, this will easily solve the problem.
Various disturbances in the airflow measurement system can also trigger the warning in question. One of these problems includes your Throttle Position Sensor or Throttle Valve malfunctioning. In this case, the engine can’t accurately control the amount of air flowing into the engine for combustion. Or it might not be able to adjust the throttle valve correctly based on output from exhaust systems. Both the cases will lead to a drop in power and a possible increase in emissions.
A similar problem is if the Mass Air Flow (MAF) sensor is not working properly. It would not register any values or register wrong values leading to improper fuel injection. Again, this would only lead to minor problems like a drop/increase in performance and an increase in emissions.
Exhaust Emission Control
Since your car is more concerned about the environment than most people are now, it will give you a warning if it feels it is not able to stick to the emission standards that were programmed into it. Other than the reasons mentioned above, two systems take control of the emissions downstream.
The O2 or Lambda sensor measures the amount of oxygen in the exhaust to predict how rich or lean the fuel mixture is. Accordingly, it would increase the injection time and throttle angle to meet the demand according to its programming. If these sensors don’t work, the fuel quantities won’t be right and thus there may be excess emissions. Even worse, it may lead to higher fuel consumption, and you may exceed your monthly fuel budget.
The Exhaust Gas Recirculation (EGR) system is responsible for reducing NOX emissions in modern cars. This is done by allowing some exhaust gasses to mix back in with intake gasses. However, if the required amount can’t be mixed due to the EGR valve malfunctioning, the NOX emissions would increase thus triggering the warning.
Electrical Systems Issues
Among the several causes for the check engine light to show up on your dashboard a problem with the electrical systems can also be one of them. For example, there might be something wrong with the battery like a very low voltage that might trigger the warning. Such low voltages prevent proper ignition.
Another possibility is the sparkplug misfiring causing abnormal combustion or “knocking”. This can be picked up by the knock sensor and thus it might signal something is wrong with the engine. It may be corrected with a change in sparkplug. Alternatively, it could also be a software problem.
Finally, a malfunction in the other sensors of the engine might also trigger the alarm. Sensors such as the cam position sensor and crank speed sensor are integral to the functioning of the internal combustion engine. Thus, if for any reason, the ECU stops receiving these signals, that may trip the engine management light in your Nissan Juke.
The Juke uses a CVT transmission which is a form of automatic transmission with nigh-infinite gear ratios. However, when you see the engine warning light turn on, it could also indicate a problem with the functioning of this. If this is the case, you might experience a noticeable difference in driveability. Thus, it is advised not to drive in this condition for too long and to get the root cause of the problem identified.
Catalytic Converter Overheating
Saving the scariest meaning of the check engine light for last. This is normally signified by the light blinking on and off continuously while driving. Most engine exhausts like the one in Nissan Juke have a temperature sensor attached to them to ensure the safe operation of the engine.
Exhaust systems already operate at temperatures over 800-900 degrees Celsius. If it increases any higher, it might damage the catalytic converter and increase exhaust emissions. In the worst-case scenario, this temperature might even cause the catalytic converter to break and damage to the engine. Keep in mind, this is one of the most expensive parts of the entire engine.
In normal operation, after combustion, the hot exhaust gases have some time before reaching the catalytic converter. Occasionally, some unburn fuel flows with the exhaust gases and burns off in the exhaust pipe (due to the high temperature there) rather than in the cylinder.
This causes a stark increase in temperature. Therefore, the problem is mostly related to the fuel injectors or the sparkplugs. However, it is best to leave accurate troubleshooting to the mechanic.
As you can see the list of possibilities concerning the engine management light in a Nissan Juke is endless. While the ones listed in this article are some of the common ones, you should always look at the owner’s manual for a better understanding of the problem and a possible DIY solution to it.
To pinpoint the exact cause of the problem, you could use an OBD scanner that identifies the error code related to the problem you are facing. This will help you narrow down which components to check and fix. If you don’t have that, it is always a good idea to take the car to a Nissan certified dealer to get a thorough check-up.
We hope this article helped you gain a better understanding of the check engine light on your Nissan Juke. At the very least you should be able to tell whether it is safe for you to drive the car home or not. Though we sincerely pray that you never come across the blinking warning.