The On-Board Diagnostic (OBD) system turns on the Jeep check engine light (CEL) when it finds a problem with the engine, transmission, or evaporative system.
This article talks about common problems that cause the Jeep check engine light to come on, as well as the symptoms and how to use an OBD-II scanner to read the fault codes yourself.
Does your Jeep’s Check Engine Light come on? Using an OBD-II Scanner, you can find out why the check engine light is on and what you can do to make the warning light go away.
Jeep Check Engine Light
If the check engine light on your Jeep Wrangler starts blinking, the problem needs to be fixed right away, so you should bring your Jeep in right away.
A flashing light means that the problem is serious and that if it isn’t fixed right away, it could cause a lot of damage to the car. This flashing light usually means that the engine is misfiring very badly, which lets unburned fuel go into the exhaust system.
There, it can quickly raise the temperature of the catalytic converter to a point where it can start to wear down, which means it will need an expensive repair. A few owners have asked if the check engine light flashes because of the spark plugs. This is a very likely reason.
Misfiring can be caused by a bad, old, or dirty spark plug. If your check engine light is flashing, please call 3178540239 to talk to our team of car experts.
If you don’t fix the problem or keep driving, it could spread to the spark plug wires, the catalytic converter, or the ignition coils, which would be a very expensive fix.
What Does the Light That Says “Check Engine” Mean?
The check engine light is one of the most commonly misunderstood lights or indicators on your Jeep.
The check engine light is an important part of the onboard diagnostics system and can show up in a number of ways. It could say “Check Engine,” it could be a picture of an engine, or it could be both. This light can be either yellow or red, and it is part of the diagnostics system in your car.
Since the 1980s, onboard computers have been controlling and monitoring car performance more and more. They can do many things for your Jeep.
Some of these important jobs include controlling the speed of the engine, the timing of the ignition, shifting automatic transmissions, and putting cohesion control into place, just to name a few. So, the check engine light can mean a number of different things. It can be as simple as a loose gas cap or as dangerous as an engine that knocks.
If your Jeep’s “Check Engine” light is on, call Larry H. Miller Casa Chrysler Jeep. Our Jeep service department can help you find out what code is making your check engine light come on or figure out why your check engine light is flashing.
How to Handle the Check Engine Light
When the light comes on, you should stop the car as soon as it is safe to do so. There are diagnostic codes on many OBDs, so you could look up the codes to find out what your car needs.
Some problems are easy to fix, like when you just have to screw the gas cap on tighter. You can just make a small change and move on.
But you should bring your Dodge or Jeep to our service centre at Farrish Dodge Jeep if the diagnostic code doesn’t show up or if you can’t fix the problem quickly.
Because problems that aren’t taken care of today often get worse and spread, the best time to fix the check engine light is right now.
Jeep Wrangler Check Engine Light Codes
When the check engine light comes on, it can be scary to see that tiny light on your car’s dashboard suddenly light up. However, you shouldn’t be so scared that you stop driving right away.
If you hear the term “diagnostic trouble codes” (DTC), it just means “check engine light codes. ” These are computer codes for your Wrangler that are stored by the ECM, which is also called the OBD (on-board computer diagnostic system).
Your check engine light can mean a lot of different back-up codes. Even though that sounds hard, if you take the time to do the essential diagnostics, you can learn useful things about your car and let the Check Engine Light do what it’s supposed to do: show you what’s wrong.
The Check Engine Light is on, but that doesn’t always mean that the car is having real problems. Since there are hundreds of possible OBD codes, there are also hundreds of possible reasons for the light, such as:
- Emissions controls issues
- Fuel and air metering systems problems
- O2 Sensor
- Used battery
- Ignition system goes wrong.
- Bad Spark Plugs
- Computer output circuit issues
- Transmission issues
- Gas Cap is Loose or Missing
Jeep Check Engine Light Flashing
Even though there are a lot of things that could cause the Check Engine Light to come on, we know from years of providing Check Engine Light Diagnosis Service that there are many common reasons, like a gas cap that isn’t tight enough.
A Check Engine Light can also be caused by a broken head gasket, a broken oxygen sensor, a problem with the fuel injection system, a dirty mass airflow sensor, a broken emissions control part, or bad spark plugs, to name a few.
No matter what is causing the Check Engine Light, we have the Jeep Certified Mechanics and the certified service protocol to find the problem and fix it as needed to bring it back to factory standards.
When this happens, the Check Engine Light will turn off, and you’ll know that the problem with your Jeep has been completely fixed.
Every Jeep was made with a high-tech performance monitoring system that includes a computer and a number of sensors placed in key areas of the car to track its most important systems.
The quick sensors are always looking at the environment and sending important information to the electronic control unit.
If the electronic control unit sees that the data is not within factory limits, the Check Engine Light will come on to let you know there is a problem.
But, unfortunately, that’s all the Check Engine Light can do. It won’t tell you what’s wrong or what to do about it.
Some causes the check engine light to come on in a Jeep?
If your car’s check engine light comes on, you might just need to tighten or replace the gas cap. Again, the check engine light could be a sign of a serious problem that could damage your engine and cost a lot to fix.
Depending on what kind of car you have, the check engine light will either be on or blink. Most of the time, a steady glow doesn’t mean anything too bad, but a flashing check engine light means that your car’s engine is in serious trouble and needs service right away.
If your Jeep’s check engine light is flashing, you should not drive the car and should get Jeep service right away. Here are the most common reasons why your check engine light might turn on:
Your Oxygen Sensor, or O2 Sensor, needs to be changed
The Oxygen sensor, also called the O2 sensor, checks how much oxygen is in your exhaust system. If there is too much oxygen in your exhaust system, your fuel will burn more quickly, and your car will use more gas.
If I don’t replace your O2 sensor, what will happen? Not only can a broken sensor change how many miles per gallon your car gets, but it can also hurt your Jeep’s catalytic converter and spark plugs.
The O2 sensor sends information to the car’s onboard computer so that the right amount of air and fuel can be put into the engine’s cylinders. A car can also fail an emissions test if its O2 sensor is broken.
Problems with any items that aren’t original
If it’s not installed right, an aftermarket alarm, exhaust, or other part can do a lot of damage to your Jeep. These aftermarket parts and accessories can drain the battery, turn on the check engine light, or even stop the car from starting.
If you’ve had any of these problems, bring your car to Jeep and our team of skilled, certified mechanics will make sure that your aftermarket parts were installed correctly and aren’t causing any problems.
Getting accessories, especially aftermarket parts and accessories, or using OEM parts from the start might cost a little more, but it could save you a lot of money in the long run if you don’t have to fix bad work or damage caused by bad installation.
The battery is dead or running low
It’s very important that your Jeep has a good battery. Without a battery, your car won’t start, it won’t light up the road in front of you, it won’t play the radio, and it won’t charge your phone.
Batteries for cars today last a lot longer than they did a few decades ago, and they don’t really need to be taken care of. The price of a new one depends on what kind of Jeep you drive, but you can check out our current coupons and specials for service.
if the gas cap on your Jeep is loose, broken, or gone
The gas cap on your Jeep has more than one job to do. It keeps dangerous gas fumes from escaping when you’re not driving. It also seals the fuel system and keeps the pressure in the fuel tank steady.
What happens if the fuel cap is broken? If your gas cap is old or the seal has been broken, you could lose gas through evaporation.
This means you’ll have to go to the pump more often, which will cost you more money. Luckily, it doesn’t cost much to get a new gas cap.
If your Jeep’s check engine light comes on quickly after you fill it up with gas, the first thing you should do is make sure the gas cap isn’t loose or that it’s still on the roof or at the fuel pump.
Your catalytic converter is broken or is about to break
The Jeep’s exhaust system includes a catalytic converter. The job of the catalytic converter is to change the carbon monoxide that is made during combustion into carbon dioxide.
Most of the time, a broken catalytic converter is caused by poor maintenance. That’s why Larry H. Miller Casa Chrysler Jeep offers a free multi-point check with every Jeep service.
If your catalytic converter is broken and you don’t get it fixed, your Jeep won’t pass an emissions test, the engine won’t run as well, and your gas mileage will go down. Your car may also run at a higher temperature, which can lead to other problems if it gets too hot.
Your Jeep needs new spark plugs and/or plug wires
The spark plugs in your car’s engine are what light the mixture of air and fuel in the combustion chamber. This explosion is what moves the pistons and makes the engine run smoothly.
The ignition coil sends the spark to the spark plugs through the spark plug wires. If your spark plugs or spark plug wires are worn out or broken, your car will run poorly and have less power.
In the worst cases, your engine won’t start or will have trouble running. When spark plugs and plug wires wear out, the catalytic converter can get clogged or the ignition coils and O2 sensors can get damaged, which can lead to more expensive repairs.
There is a vacuum leak in your Jeep
Every Jeep has a vacuum system that does a lot of different things. The vacuum system also helps cut down on harmful emissions by directing the fumes that come out of the engine when gasoline evaporates.
If your RPM is high at idle or goes up and down randomly, it could be because of a vacuum leak. Vacuum hoses can dry out and crack over time, especially if they are exposed to very hot or very cold temperatures.
Your MAF, or mass airflow sensor, needs to be changed
The mass airflow sensor in your Jeep measures the amount of air going into the engine to figure out how much fuel your engine needs to run well.
The mass airflow sensor is a part of the engine management system. It helps the engine adjust to changes like altitude.
If your Jeep is hard to start, runs rough, or the throttle pedal moves quickly and suddenly, this could be a sign that the mass airflow sensor is broken.
Is it safe to drive with the check engine light on in your Jeep Wrangler?
If the check engine light is flashing, there is a real problem, and you should take your Jeep Wrangler in for service right away.
This question is not very easy to answer because it depends on how bad the problem is. If the problem is small, like a loose gas cap, the car should be safe to drive.
Often, this is shown by the check engine light shining brightly. If the car’s performance changes, it could be a sign of a bigger problem.
Will the “Check Engine” light turn off on its own?
If the problem or code that made your Jeep Wrangler’s check engine light come on is fixed, the light will usually turn off by itself.
For example, if your check engine light came on because your gas cap was loose, tightening it will turn off the light. Also, if your catalytic converter is going bad and you did a lot of stop-and-go driving, the check engine light may have come on because the converter was used so much.
Most of the time, after 20 to 40 miles, the light on your Jeep Wrangler will turn off. If you drive more than that amount and the light is still on, you will need to take it to Mike Shaw Chrysler Dodge Jeep Ram so the light and code can be checked again and reset.
How far can you go when the check engine light is on?
The safest thing to do is figure out what the code means and then plan your strategy based on that. It could be a bad sensor or that the plug wires need to be changed.
Since each check engine code has its own level of severity, it is hard to say how many miles you can drive with the warning light on.
If your check engine light is blinking, you should pull over and call Mike Shaw Chrysler Dodge Jeep Ram. They can help you figure out if your car is safe to drive or if you should call a tow truck.
How much does it cost to have someone check the engine light?
The check engine light can be a sign of problems as small as a loose gas cap or as big as a bad catalytic converter or a problem with one of the car’s oxygen sensors, so it’s important to read the code and figure out what’s wrong.
Most of the time, testing and diagnosing a check engine light costs between $88 and $111.