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How To Reset Check Engine Light On Jeep Wrangler?

Having your engine light on, with or without problems, can be bothersome. In that case, you’ll need to know how to reset check engine light on Jeep Wrangler

The process isn’t that tricky. To reset your check engine light on a Jeep Wrangler, you’ll have to disconnect the battery terminal and wait for 5 to 7 minutes. After getting done with the waiting period, turn on your ignition key to run position without starting. You’ll find that all the codes are cleared up, and the light is turned off. 

The check engine light warns you in code. Each code has a specific problem indication. To turn it off, resolve the issue that it’s indicating. Sometimes the light can also give a false signal. In all of these cases, resetting the light follows the same procedure. 

What Does The Check Engine Light Mean On A Jeep Wrangler? 

The check engine light means your vehicle’s engine is going through some malfunction. With the malfunction detection sensor, any issues that need to be fixed will be detected.

A Jeep Wrangler has a Powertrain Control Module (PMC) computer installed. This computer helps to diagnose any issue with the engine. Whenever a trouble code is sent to PMC, it lights up the engine light. 

Mainly the light indicates issues like fault in the ignition coil, problems with the mass airflow, fault in the spark plugs, missing or loosening the gas cap, oxygen sensor, and catalytic converter issue. The light can also indicate misfiring or stalls while running. 

There’re codes you can decode to identify the issue with your engine. Each code indicates a specific problem. Also, there’s a probability you can get a false indication. But that also shouldn’t be ignored. 

Can You Reset Check Engine Light On Jeep Wrangler? 

Yes, you can reset your check engine light to turn it off. Whenever your engine light is on, it means your Jeep Wrangler is going through troubleshooting. And that must be fixed with an expert. 

You can take it to free service or a neighborhood mechanic. If you’re an old user and quite familiar with Jeep Wrangler, you can identify the issue yourself.

After they resolve the issue you the light should be reset automatically. But sometimes, that takes a long time. The PMC still holds on to the last memory for a while. The best option to deal with the issue is to manually reset the check engine light on your Jeep Wrangler. 

How To Reset Check Engine Light On Jeep Wrangler? 

Resetting the Check Engine light on a Jeep Wrangler manually is pretty straightforward. With only a few steps, you can do it without any help. Here’s a basic breakdown:

Step 1: No Ignition

At the very first step, turn off your Jeep’s engine. Make sure to pull off your ignition key. This will enable you to work with your battery.

Step 2: Battery Setting

Now it’s time to lose up the clamp bolts of the positive terminal. Locate the positive terminal and lose the clips. Using a wrench, you can loosen them. 

Step 3: Separating The Clamps

After losing up the clamps, separate them along with the terminal. Make sure that positive clamps and terminals don’t get in touch with the negative terminal. This can cause friction. 

Step 4: Resetting The Clamps

Give about 5 to 7 minutes of standing time. After that, re-attach the terminal with the clamps. Make sure they’re in the same place as before.

Step 5: Starting The Engine

Put on your ignition key. Keep the vehicle in the run mode. Don’t start your engine. Keep it there for a minute, and you’ll find your check engine light is off. That means it has been reset. 

Resetting the check engine light might seem technical to the new users. If you aren’t familiar with the Jeep Wrangler battery, make sure to take help from an expert.

How To Clear Codes On Jeep Wrangler?

Clearing up the codes on Jeep Wrangler is no different than resetting the check engine light. While you do the resetting of the check engine light, the previous pulled-out codes are cleared too. You’ll not have to work on them separately. 

To reset the check engine light, you’ll need to pull the battery terminal’s clamps. It disconnects the power supply.

The battery is the primary energy source of the electronic capacitors on a Jeep Wrangler. However, the energy modules and capacitors lose their memory once they get disconnected from their power source. Therefore any error or legit codes can be erased when they get deprived of energy sources. 

It only needs a few seconds between charging and disconnecting to lose the memory. It’s said to take 5 to 7 minutes so that the default memory can be restored. 

These generated codes allow you to browse the internet to know the start of the troubleshooting. For each issue, you’ll get a six-character code. And when the issue is resolved, pulling off the battery terminals will allow you to get back to the default setting. 

How To Pull The Codes On The Instrument Panel

If you want to work on your check engine light, you’ll need to decode the code that Powertrain Control Module (PMC) is providing. To get the code, you’ll need to pull the codes on the instrument panel. The process is straightforward to do.

Step 1: Make sure to close the door of the vehicle. Jeep Wranglers don’t get the ignition to begin if the doors aren’t correctly closed.

Step 2: Input the ignition key. Turn it to “Run” from “Off” 3 consecutive times. Make sure it ends in “Run.” The turning should be done without a time-lapse. 

Step 3: The odometer in your Jeep Wrangler will read and display the error code. You’ll have to google the code. This will let you know the error your vehicle is facing.

Some users also reported that they didn’t get the code the 1st time. In that case, just repeat the procedure once again, and you’ll get yourself a code. 

Sometimes due to faulty odometers, you mightn’t be able to generate a code at all. You need to take help from an OBD2 Scanner or an expert.

Jeep Wrangler Check Engine Light No Codes 

It has been reported by the users of Jeep Wranglers that they face the check engine light in case of disturbance. But the issue arises when they can’t get a code on the instrument panel. There’re two possible causes of it.

Bad Fuel: After getting fuel from a questionable source, most users say they have faced “no code issue.”

Hidden Code: Some reports say they get an error code or no code at all. And with this, it’s impossible to know what to resolve.

With no code generation, you’ll need to consult a mechanic or service center. This visit will cost you from 500 USD to 1000 USD just to know if your vehicle is ok or not. In this case, an OBD2 scanner can be your way out.

OBD2 scanner scans code in any circumstance. If you’re getting a faulty signal and no code, it’ll save you hundreds of dollars. 

Also, if you’re in a deserted area, away from mechanics, an OBD2 scanner can save your day. You’ll get to know your issue, and some DIY solutions will allow you to get home. Also, you can ask for proper help from mechanics in your neighborhood. 

Will The Check Engine Light Reset Itself? 

Modern vehicles like Jeep Wranglers can reset themselves. But in most cases, it fails due to some limitations of PCM. 

After you have repaired your engine issue, you’re asked to take a drive. This will help your vehicle to get into the default setting. Sometimes it takes a few rides to get into default mode as before. 

It can be disturbing for a driver getting constant false notifications. That’s why people prefer to do the resetting of the check engine light manually. It helps to concentrate on driving.


Jeep Wrangler is a passion for lots of its users. And to maintain it, the check engine light plays a vital role. It tells you when to take care of your jeep. With this, you can avoid danger. But knowing how to reset check engine light on Jeep Wrangler after the repair is done is also essential. Otherwise, it may cause disturbance of concentration while driving and deprive you of noticing the next issue. Be safe and drive safe!

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