This guide walks you through how to reset the engine light on a 2016 Jeep Cherokee using simple methods like OBD2 scanners, battery disconnection, or built-in dashboard procedures. You’ll also learn when it’s safe to reset the light and when to seek professional help.
Key Takeaways
- Understand the cause first: Never reset the engine light without diagnosing the underlying issue—ignoring it could lead to serious engine damage.
- Use an OBD2 scanner for accuracy: This is the most reliable and recommended method to read error codes and reset the light safely.
- Disconnecting the battery works—but has drawbacks: It can reset the light, but may also erase radio presets, adaptive transmission settings, and other stored data.
- Some issues resolve automatically: Minor problems like loose gas caps may clear on their own after a few drive cycles.
- Resetting doesn’t fix the problem: The light will return if the issue persists, so always confirm the repair before resetting.
- Professional help is sometimes needed: Complex issues like transmission or emissions faults should be handled by a certified mechanic.
- Keep records of repairs and resets: This helps with future diagnostics and maintains your vehicle’s service history.
How to Reset Engine Light 2016 Jeep Cherokee
If you’ve noticed the dreaded “Check Engine” light glowing on your 2016 Jeep Cherokee’s dashboard, you’re not alone. It’s one of the most common concerns for Jeep owners—and for good reason. That little amber light can mean anything from a loose gas cap to a serious engine malfunction. But once you’ve fixed the problem, the next logical step is figuring out how to reset engine light 2016 Jeep Cherokee.
In this comprehensive guide, you’ll learn everything you need to know about resetting the engine light on your 2016 Jeep Cherokee. We’ll walk you through multiple methods—from using an OBD2 scanner to disconnecting the battery—and explain when each is appropriate. You’ll also get practical tips, troubleshooting advice, and important safety reminders to ensure you don’t make the problem worse.
By the end of this guide, you’ll not only know how to reset the light, but also understand what caused it in the first place—and how to prevent it from coming back.
Why the Engine Light Comes On
Before we dive into resetting the light, it’s crucial to understand why it turned on in the first place. The “Check Engine” light—also known as the Malfunction Indicator Lamp (MIL)—is part of your vehicle’s onboard diagnostics system (OBD2). This system constantly monitors sensors and components related to engine performance, emissions, and fuel efficiency.
When the system detects a problem, it stores a diagnostic trouble code (DTC) and triggers the engine light. These codes can range from minor issues like a faulty oxygen sensor to more serious problems like a misfiring cylinder or catalytic converter failure.
Common causes for the engine light in a 2016 Jeep Cherokee include:
- Loose or damaged gas cap
- Faulty oxygen (O2) sensor
- Mass airflow (MAF) sensor issues
- Spark plug or ignition coil problems
- Evaporative emissions system leaks
- Catalytic converter inefficiency
- Engine misfires
The 2016 Jeep Cherokee is equipped with a robust OBD2 system that meets federal emissions standards. That means it’s designed to catch even small deviations from normal operation. While this helps keep your vehicle running cleanly, it also means the light can come on for seemingly minor issues.
The key takeaway? Never assume the problem is trivial. Always diagnose the issue before attempting to reset the light.
Method 1: Using an OBD2 Scanner (Recommended)
The most accurate and safest way to reset the engine light on your 2016 Jeep Cherokee is by using an OBD2 scanner. This handheld device plugs into your vehicle’s diagnostic port and communicates directly with the onboard computer. It can read trouble codes, display live data, and—most importantly—clear the codes and reset the light.
Step 1: Locate the OBD2 Port
The OBD2 port in the 2016 Jeep Cherokee is located under the dashboard, near the driver’s side footwell. It’s usually positioned just below the steering column and may be covered by a small plastic panel. Simply pull the panel down to reveal the 16-pin connector.
Visual guide about How to Reset Engine Light 2016 Jeep Cherokee
Image source: m.media-amazon.com
Step 2: Plug in the Scanner
Turn off the ignition, then plug your OBD2 scanner into the port. Make sure it’s fully seated and secure. Some scanners will power on automatically when connected; others may require you to turn the ignition to the “ON” position (without starting the engine).
Step 3: Read the Trouble Codes
Follow the scanner’s on-screen prompts to read the stored trouble codes. Most scanners will display a code like “P0455” or “P0171.” Write down the code(s) for reference. You can then look up the meaning online or in your scanner’s manual. For example, P0455 typically indicates a large evaporative emissions leak—often caused by a loose gas cap.
Step 4: Fix the Underlying Issue
Before resetting the light, address the root cause. If the code points to a loose gas cap, tighten it or replace it if damaged. If it’s a sensor issue, you may need to replace the part. Never reset the light without fixing the problem—otherwise, it will just come back on.
Step 5: Clear the Codes and Reset the Light
Once the issue is resolved, use the scanner’s “Clear Codes” or “Erase DTCs” function. This will reset the engine light and clear the stored trouble codes. The scanner may ask you to confirm the action—select “Yes” or “OK.”
Step 6: Verify the Reset
Turn the ignition off, then back on. The engine light should remain off. If it comes back on after a few minutes or after driving, the problem may not be fully resolved, or a new issue may have occurred.
Tips for Using an OBD2 Scanner
- Choose a scanner with live data and code lookup features for better diagnostics.
- Keep the scanner updated with the latest software for accurate readings.
- Some advanced scanners can perform system tests, like checking the EVAP system or oxygen sensor response.
- If you don’t own a scanner, many auto parts stores (like AutoZone or O’Reilly) offer free code reading and reset services.
Method 2: Disconnecting the Battery
If you don’t have access to an OBD2 scanner, disconnecting the vehicle’s battery is a common alternative. This method forces the vehicle’s computer to reset by cutting power to the system. However, it’s not as precise as using a scanner and comes with some drawbacks.
Step 1: Turn Off the Ignition
Make sure the ignition is off and the key is removed from the vehicle. This prevents any electrical surges or damage during the process.
Step 2: Locate the Battery
The battery in the 2016 Jeep Cherokee is located in the engine compartment on the driver’s side. It’s housed in a black plastic box with a red positive (+) terminal and a black negative (-) terminal.
Step 3: Disconnect the Negative Terminal
Use a 10mm wrench or socket to loosen the nut on the negative (black) battery terminal. Carefully remove the cable and secure it away from the battery post so it doesn’t accidentally reconnect. Do not disconnect the positive terminal first—this can cause sparks and damage.
Step 4: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes. This allows the vehicle’s computer (ECU) to fully discharge and reset. Some sources recommend up to 30 minutes for a complete reset, especially if you’re trying to clear adaptive learning data.
Step 5: Reconnect the Battery
Reattach the negative cable to the battery terminal and tighten the nut securely. Make sure the connection is tight to avoid voltage drops or electrical issues.
Step 6: Turn On the Ignition
Turn the ignition to the “ON” position (without starting the engine) and wait a few seconds. Then start the vehicle. The engine light should be off. If it remains off after driving for a few minutes, the reset was successful.
Drawbacks of Battery Disconnection
- Loss of radio presets: You may need to reprogram your favorite stations.
- Reset of adaptive transmission settings: The transmission may feel “rough” for a few drive cycles as it relearns your driving habits.
- Clock and trip meter reset: The time and trip data will revert to zero.
- Security system reactivation: Some vehicles may require a security code to reactivate the radio or immobilizer.
While this method can work, it’s best used as a last resort. It doesn’t tell you what caused the light in the first place, and it may not clear all trouble codes—especially if the underlying issue persists.
Method 3: Drive Cycle Reset (Automatic Clear)
In some cases, the engine light may turn off on its own after a few drive cycles—especially if the issue was minor and has been resolved. This is known as an “automatic clear” and happens when the vehicle’s computer no longer detects the fault.
What Is a Drive Cycle?
A drive cycle is a series of driving conditions that allow the onboard computer to test various systems. For the 2016 Jeep Cherokee, a typical drive cycle includes:
- Starting the engine when cold (below 160°F)
- Driving at varying speeds (city and highway)
- Accelerating and decelerating smoothly
- Coming to a complete stop
- Idling for a few minutes
How Long Does It Take?
Most drive cycles take between 20 to 40 minutes of mixed driving. The computer will recheck the system and, if no faults are detected, may turn off the engine light automatically. This process can take anywhere from one to several days, depending on how often you drive.
When This Method Works
- Loose gas cap that has been tightened
- Minor sensor glitches that resolved on their own
- Temporary fuel system fluctuations
Limitations
This method won’t work if the problem is still present. The light will only turn off if the fault is no longer detected. If the light remains on after several drive cycles, you’ll need to use a scanner or visit a mechanic.
Method 4: Using the Dashboard (Limited Functionality)
Some vehicles allow you to reset certain warning lights using the dashboard controls, but the 2016 Jeep Cherokee does not have a built-in feature to reset the engine light manually. Unlike oil change reminders or tire pressure warnings, the Check Engine light cannot be cleared through the instrument cluster menu.
However, you can use the dashboard to monitor the status of the light:
- If the light is flashing, it indicates a severe misfire that could damage the catalytic converter—pull over safely and seek immediate help.
- If the light is steady, the issue is less urgent but still requires attention.
Attempting to reset the engine light using dashboard buttons will not work. Always use an OBD2 scanner or battery disconnection method instead.
Troubleshooting Common Issues
Even after resetting the engine light, you may run into problems. Here’s how to troubleshoot the most common issues:
The Light Comes Back On Immediately
If the engine light returns right after resetting, the underlying issue has not been fixed. Use an OBD2 scanner to read the new code and address the problem. Common causes include:
- Faulty oxygen sensor
- Persistent misfire
- EVAP system leak
The Light Flickers or Flashes
A flashing engine light indicates a serious problem, such as a severe engine misfire. This can cause unburned fuel to enter the exhaust system and damage the catalytic converter. Stop driving immediately and have the vehicle towed to a repair shop.
Scanner Won’t Connect or Read Codes
If your OBD2 scanner fails to communicate with the vehicle, check the following:
- Ensure the ignition is in the “ON” position.
- Verify the OBD2 port is clean and undamaged.
- Try a different scanner or visit an auto parts store for a free scan.
- Check for blown fuses related to the OBD2 system (usually in the under-hood fuse box).
Battery Disconnection Didn’t Work
If disconnecting the battery didn’t reset the light, the issue may be:
- The problem still exists and the computer re-detected it.
- The ECU retained some memory despite the power loss.
- The light is controlled by a separate module that wasn’t reset.
In this case, use an OBD2 scanner for a more reliable reset.
When to See a Mechanic
While many engine light issues can be resolved at home, some problems require professional diagnosis and repair. Seek help from a certified mechanic if:
- The light is flashing or blinking.
- You notice performance issues like rough idling, stalling, or loss of power.
- The scanner shows complex codes related to the transmission, emissions, or engine control.
- You’re unsure how to interpret the trouble codes.
- The light keeps returning after multiple resets.
A professional mechanic has advanced diagnostic tools and can perform tests like smoke testing for EVAP leaks or compression testing for engine issues. They can also ensure repairs are done correctly and safely.
Preventing Future Engine Light Issues
Once you’ve reset the engine light, take steps to prevent it from coming back:
- Check the gas cap regularly: Make sure it’s tight after every fill-up. Replace it if it’s cracked or worn.
- Use quality fuel: Stick to reputable gas stations to avoid contaminated fuel.
- Follow the maintenance schedule: Replace spark plugs, air filters, and oxygen sensors as recommended in your owner’s manual.
- Address warning signs early: Don’t ignore rough idling, poor fuel economy, or unusual smells.
- Keep the engine clean: Dirt and debris can affect sensor performance.
Conclusion
Resetting the engine light on your 2016 Jeep Cherokee doesn’t have to be intimidating. Whether you use an OBD2 scanner, disconnect the battery, or rely on a drive cycle, the key is to always address the root cause first. Ignoring the problem won’t make it go away—and could lead to costly repairs down the road.
The OBD2 scanner method is the most reliable and informative, giving you insight into what triggered the light in the first place. Battery disconnection is a viable backup, but comes with trade-offs. And while some minor issues may resolve on their own, don’t count on it.
By following this guide, you’ll not only know how to reset engine light 2016 Jeep Cherokee, but also how to keep your vehicle running smoothly for years to come. Stay proactive, stay informed, and don’t let that little light stress you out.