This guide walks you through how to reset the check engine light on a 2013 Jeep Grand Cherokee using simple methods like driving cycles, OBD2 scanners, and battery disconnection. Always diagnose the root cause first to avoid recurring issues.
Key Takeaways
- Diagnose the problem first: Never reset the light without identifying and fixing the underlying issue, such as a loose gas cap or faulty oxygen sensor.
- Use an OBD2 scanner for accuracy: This is the most reliable method to clear codes and reset the light on your 2013 Grand Cherokee.
- Drive cycle method works over time: After repairs, driving under specific conditions can allow the vehicle to pass emissions tests and turn off the light automatically.
- Battery disconnection is a temporary fix: While it may reset the light, it also clears important vehicle settings and may not work if the issue persists.
- Check gas cap regularly: A loose or damaged gas cap is one of the most common causes of a check engine light in Jeeps.
- Use quality fuel and maintenance: Prevent future warnings by using top-tier gasoline and following the recommended service schedule.
- Consult a mechanic if unsure: If the light returns or you’re uncomfortable performing diagnostics, seek professional help.
How to Reset Check Engine Light Jeep Grand Cherokee 2013
If you’re driving a 2013 Jeep Grand Cherokee and the dreaded check engine light pops up on your dashboard, don’t panic. While it can be alarming, this warning is your vehicle’s way of saying, “Hey, something needs attention.” The good news? Resetting the check engine light is often straightforward—but only after you’ve addressed the root cause.
In this comprehensive guide, you’ll learn how to reset the check engine light on a 2013 Jeep Grand Cherokee using safe, effective methods. We’ll cover everything from diagnosing the issue to using an OBD2 scanner, performing a drive cycle, and even disconnecting the battery. You’ll also get practical tips to prevent the light from coming back and troubleshooting advice if things don’t go as planned.
Whether you’re a DIY enthusiast or just want to understand what’s happening under the hood, this guide will walk you through each step with clarity and confidence. Let’s get started.
Understanding the Check Engine Light
Visual guide about How to Reset Check Engine Light Jeep Grand Cherokee 2013
Image source: wonder007.com.tw
Before you reset the light, it’s important to understand what it means. The check engine light—also known as the malfunction indicator lamp (MIL)—is part of your Jeep’s onboard diagnostics system (OBD2). When the vehicle’s computer detects a problem with the engine, emissions, or other critical systems, it triggers the light and stores a diagnostic trouble code (DTC).
These codes can range from minor issues like a loose gas cap to serious problems like a failing catalytic converter. Ignoring the light can lead to reduced fuel efficiency, increased emissions, or even engine damage over time.
So, while resetting the light might make it disappear temporarily, it won’t fix the problem. That’s why the first step is always diagnosis.
Step 1: Diagnose the Problem
You can’t reset the check engine light effectively unless you know why it came on in the first place. Skipping this step is like turning off a smoke alarm without checking for fire.
Use an OBD2 Scanner
The most accurate way to diagnose the issue is by using an OBD2 scanner. These devices plug into your Jeep’s diagnostic port—usually located under the dashboard, near the steering wheel—and read the trouble codes stored in the vehicle’s computer.
Here’s how to do it:
- Turn off the ignition and locate the OBD2 port. In the 2013 Grand Cherokee, it’s typically on the driver’s side, below the steering column.
- Plug in your OBD2 scanner. Make sure it’s compatible with your vehicle (most modern scanners work with all OBD2-equipped cars made after 1996).
- Turn the ignition to the “ON” position (but don’t start the engine). The scanner should power up and begin communicating with the vehicle.
- Follow the scanner’s prompts to retrieve the trouble codes. Common codes for the 2013 Grand Cherokee include P0455 (large evaporative emission leak) or P0133 (oxygen sensor slow response).
- Write down the codes and research their meaning. Many scanners come with built-in code definitions, or you can look them up online.
Once you know the code, you can determine the likely cause. For example, a P0455 code often points to a loose or damaged gas cap—a quick and easy fix.
Check Common Causes
If you don’t have a scanner, you can still perform a visual inspection for common issues:
- Gas cap: Make sure it’s tight and not cracked. A loose cap is one of the top reasons for a check engine light.
- Spark plugs and wires: Worn spark plugs can cause misfires, triggering the light.
- Air filter: A clogged air filter reduces engine efficiency and may set off a code.
- Oxygen sensors: These monitor exhaust gases and can fail over time.
- Mass airflow sensor: A dirty or faulty MAF sensor can disrupt fuel delivery.
Even if you plan to reset the light yourself, diagnosing the issue ensures you’re not just covering up a serious problem.
Step 2: Fix the Underlying Issue
Once you’ve identified the problem, it’s time to fix it. Here are some common repairs for the 2013 Jeep Grand Cherokee:
Tighten or Replace the Gas Cap
If the code points to an evaporative emissions leak, start with the gas cap. Turn it clockwise until you hear it click—usually 3 to 4 clicks. If it’s cracked or the seal is worn, replace it with an OEM or high-quality aftermarket cap.
Replace Faulty Sensors
Oxygen sensors and the mass airflow sensor are wear items that degrade over time. Replacing them requires basic tools and some mechanical know-how. For the MAF sensor, disconnect the electrical connector, remove the mounting screws, and install the new one. For oxygen sensors, you’ll need a special socket wrench.
Change Spark Plugs
The 2013 Grand Cherokee typically uses 6 spark plugs (V6) or 8 (V8). Replace them every 60,000 to 100,000 miles. Use a torque wrench to avoid over-tightening.
Clean or Replace the Air Filter
A dirty air filter restricts airflow and can trigger a check engine light. Remove the air filter housing, inspect the filter, and replace it if it’s clogged with dirt or debris.
After completing the repair, you’re ready to reset the check engine light.
Step 3: Reset the Check Engine Light
Now that the issue is fixed, you can reset the light. There are several methods, each with pros and cons.
Method 1: Use an OBD2 Scanner (Recommended)
This is the most reliable and professional way to reset the check engine light.
- Plug the OBD2 scanner into the diagnostic port.
- Turn the ignition to the “ON” position.
- Navigate the scanner menu to find the “Clear Codes” or “Erase DTCs” option.
- Confirm the action. The scanner will send a command to the vehicle’s computer to clear all stored trouble codes.
- Turn off the ignition and unplug the scanner.
After resetting, start the engine. The check engine light should be off. If it comes back on, the problem wasn’t fully resolved.
Method 2: Drive Cycle (Automatic Reset)
Some issues can be resolved by driving the vehicle under specific conditions, allowing the onboard computer to run self-tests and confirm the problem is fixed.
For the 2013 Grand Cherokee, a typical drive cycle includes:
- Start the engine and let it idle for 2–3 minutes (cold start).
- Drive at 30–40 mph for 5 minutes.
- Accelerate to 55–60 mph and maintain speed for 10 minutes.
- Decelerate to 20 mph without braking hard.
- Repeat the cycle 2–3 times.
During this process, the vehicle’s computer monitors sensors and systems. If all tests pass, it will automatically turn off the check engine light.
This method works best for intermittent issues or after minor repairs like tightening the gas cap. However, it can take several days of driving to complete all tests.
Method 3: Disconnect the Battery
Disconnecting the battery can reset the vehicle’s computer and clear the check engine light. However, this method has drawbacks.
- Turn off the ignition and remove the key.
- Open the hood and locate the battery.
- Use a wrench to loosen the negative (-) terminal clamp.
- Remove the negative cable and wait at least 15 minutes. This allows the vehicle’s capacitors to discharge and the computer to reset.
- Reconnect the negative cable and tighten it securely.
- Start the engine. The check engine light should be off.
Important notes:
- This method may also reset other systems, including radio presets, clock, and adaptive transmission settings.
- If the underlying issue isn’t fixed, the light will likely return.
- Some vehicles require a relearn procedure after battery disconnection (e.g., idle relearn for the throttle body).
While battery disconnection is simple, it’s not the most reliable long-term solution.
Method 4: Use the Ignition Key Trick (Not Recommended)
Some online forums suggest a “key trick” to reset the check engine light: turn the key to “ON” three times within 10 seconds. However, this method does not work on the 2013 Jeep Grand Cherokee and can confuse the vehicle’s computer.
Avoid this approach—it’s outdated and ineffective for modern OBD2 systems.
Step 4: Verify the Reset
After resetting the light, it’s important to confirm the fix was successful.
Monitor the Dashboard
Start the engine and watch the dashboard. The check engine light should remain off. If it flashes or comes back on immediately, there’s still an active problem.
Take a Test Drive
Drive the vehicle for at least 10–15 minutes under varied conditions (city and highway). This gives the computer time to run diagnostics.
Recheck with OBD2 Scanner
Use your scanner to check for pending or stored codes. If no codes appear, the reset was successful.
Troubleshooting Common Issues
Even after following these steps, you might run into problems. Here’s how to handle them.
Check Engine Light Comes Back On
If the light returns, the original issue wasn’t fully resolved. Recheck the trouble codes and inspect related components. For example, if you replaced the gas cap but the P0455 code persists, there may be a leak in the EVAP system.
Scanner Won’t Connect
If your OBD2 scanner won’t communicate with the vehicle:
- Ensure the ignition is in the “ON” position.
- Check the OBD2 port for dirt or damage.
- Try a different scanner or update the software.
- Verify the vehicle’s fuse for the OBD2 system (usually in the interior fuse box).
Battery Disconnection Causes Issues
After disconnecting the battery, you might notice:
- The radio asks for a code (check your owner’s manual for the reset procedure).
- The transmission shifts roughly (allow 10–15 minutes of driving for adaptive learning).
- The idle is rough (the throttle body may need a relearn procedure).
In most cases, these issues resolve after a short drive.
Check Engine Light Flashes While Driving
A flashing check engine light indicates a severe misfire that can damage the catalytic converter. Pull over safely, turn off the engine, and have the vehicle towed to a repair shop. Do not continue driving.
Preventing Future Check Engine Lights
The best way to avoid resetting the check engine light is to prevent it from coming on in the first place.
Regular Maintenance
Follow the maintenance schedule in your owner’s manual. Key items include:
- Oil changes every 6,000–7,500 miles.
- Spark plug replacement every 60,000–100,000 miles.
- Air filter replacement every 15,000–30,000 miles.
- Fuel system cleaning every 30,000 miles.
Use Quality Fuel
Fill up at reputable stations and consider using top-tier gasoline, which contains detergents that keep fuel injectors clean.
Inspect the Gas Cap
After every fill-up, make sure the gas cap is tight. Replace it if it’s damaged.
Address Warning Lights Promptly
Don’t ignore the check engine light. Early diagnosis and repair save money and prevent bigger problems.
When to See a Mechanic
While many check engine light issues can be handled at home, some require professional help.
Seek a mechanic if:
- The light is flashing.
- You’re unable to retrieve or interpret trouble codes.
- The problem involves the transmission, catalytic converter, or engine internals.
- The light returns after multiple resets.
- You’re uncomfortable performing repairs.
A certified technician has advanced diagnostic tools and can perform repairs safely and correctly.
Conclusion
Resetting the check engine light on a 2013 Jeep Grand Cherokee is a manageable task—if you take the right approach. Start by diagnosing the problem using an OBD2 scanner, fix the underlying issue, and then reset the light using the scanner, drive cycle, or battery disconnection method.
Remember, the goal isn’t just to turn off the light—it’s to ensure your Jeep runs smoothly and efficiently. Regular maintenance, quality fuel, and prompt attention to warnings will keep your Grand Cherokee in top shape for years to come.
By following this guide, you’ll not only learn how to reset the check engine light but also gain confidence in maintaining your vehicle. Stay proactive, stay informed, and enjoy the ride.