Resetting the check engine light on your 2013 Nissan Altima doesn’t have to be complicated. This guide walks you through safe methods—from using an OBD2 scanner to driving cycles—so you can clear the light and ensure your car runs smoothly.
Key Takeaways
- Diagnose first: Always identify the cause of the check engine light before resetting it to avoid recurring issues.
- Use an OBD2 scanner: The most reliable and recommended method for safely resetting the light on a 2013 Altima.
- Battery disconnect is a temporary fix: Disconnecting the battery may reset the light, but it can also erase important vehicle settings.
- Drive cycle matters: After resetting, complete a proper drive cycle to allow the car’s computer to relearn and verify repairs.
- Don’t ignore the light: A persistent check engine light could signal serious engine or emissions problems requiring professional attention.
- Keep records: Document any error codes and repairs for future reference or resale value.
- Prevention is key: Regular maintenance helps prevent check engine light triggers like loose gas caps or faulty oxygen sensors.
How to Reset Check Engine Light on 2013 Nissan Altima
If you’ve noticed the dreaded check engine light glowing on your 2013 Nissan Altima’s dashboard, you’re not alone. It’s one of the most common concerns among car owners—and for good reason. That little orange or yellow light can mean anything from a loose gas cap to a serious engine malfunction. But once you’ve diagnosed and fixed the issue, the next step is resetting the light so your dashboard stays clean and your mind stays at ease.
In this comprehensive guide, you’ll learn exactly how to reset the check engine light on your 2013 Nissan Altima—safely, effectively, and without unnecessary trips to the mechanic. We’ll cover multiple methods, from high-tech OBD2 scanners to simple battery resets, and explain when each is appropriate. You’ll also get practical tips, troubleshooting advice, and important warnings to help you avoid common mistakes.
Whether you’re a DIY enthusiast or just trying to save a few bucks on service fees, this guide will walk you through every step with clear, easy-to-follow instructions. By the end, you’ll know not only how to reset the light but also how to keep it off for good.
Why the Check Engine Light Comes On
Visual guide about How to Reset Check Engine Light on 2013 Nissan Altima
Image source: shstreetcar.com
Before we dive into resetting the light, it’s important to understand why it came on in the first place. The check engine light—also known as the malfunction indicator lamp (MIL)—is part of your car’s onboard diagnostics system (OBD2). This system constantly monitors engine performance, emissions, fuel efficiency, and other critical functions.
On a 2013 Nissan Altima, the light can be triggered by dozens of issues, ranging from minor to severe. Some of the most common causes include:
- A loose or faulty gas cap
- A failing oxygen (O2) sensor
- A misfiring engine
- A clogged catalytic converter
- Faulty spark plugs or ignition coils
- Mass airflow (MAF) sensor problems
- Evaporative emissions system leaks
The 2013 Altima uses a sophisticated OBD2 system that stores diagnostic trouble codes (DTCs) when a problem is detected. These codes help mechanics—and you—pinpoint the exact issue. That’s why simply resetting the light without fixing the root cause is like putting a bandage on a broken bone. The light will likely come back on, and the problem could worsen over time.
So, the first rule of resetting the check engine light is: always diagnose the problem first. Use an OBD2 scanner to read the code, research what it means, and address the underlying issue. Only then should you proceed to reset the light.
Tools You’ll Need
Depending on the method you choose, you may need one or more of the following tools:
- OBD2 Scanner: This is the most effective and recommended tool. It plugs into your car’s diagnostic port and allows you to read and clear trouble codes. Basic models start around $20, while more advanced ones offer live data and code definitions.
- Owner’s Manual: Your 2013 Altima’s manual contains useful information about the check engine light, fuse box location, and battery reset procedures.
- Socket Wrench or Pliers: Needed if you plan to disconnect the battery.
- Safety Gloves and Glasses: Always protect yourself when working under the hood.
- Notepad and Pen: To record error codes and repair steps for future reference.
Having the right tools on hand makes the process smoother and safer. If you don’t already own an OBD2 scanner, consider investing in one—they’re useful for future diagnostics and can save you hundreds in mechanic fees over time.
Method 1: Using an OBD2 Scanner (Recommended)
The best and most reliable way to reset the check engine light on your 2013 Nissan Altima is by using an OBD2 scanner. This method is safe, accurate, and preserves your vehicle’s settings. Here’s how to do it step by step.
Step 1: Locate the OBD2 Port
The OBD2 port on a 2013 Nissan Altima is typically located under the dashboard on the driver’s side. You’ll find it near the steering column, just above the brake pedal. It’s a 16-pin connector, usually black or gray, and may be covered by a small plastic flap.
To access it, simply kneel or crouch in the driver’s footwell and look up. If you can’t find it, consult your owner’s manual—it will have a diagram showing the exact location.
Step 2: Turn Off the Engine
Make sure your car is completely off before plugging in the scanner. This prevents any electrical surges or communication errors between the scanner and the car’s computer.
Step 3: Plug in the OBD2 Scanner
Insert the scanner’s connector into the OBD2 port. It should fit snugly—don’t force it. Once connected, turn the ignition to the “ON” position (but don’t start the engine). This powers up the car’s computer and allows the scanner to communicate with it.
Step 4: Read the Trouble Codes
Follow the scanner’s on-screen instructions to read the diagnostic trouble codes (DTCs). Most scanners will display a code like “P0420” or “P0171.” Write down the code(s) and use the scanner’s built-in database or an online resource to understand what they mean.
For example:
- P0420: Catalyst system efficiency below threshold
- P0171: System too lean (Bank 1)
- P0300: Random/multiple cylinder misfire detected
Understanding the code helps you determine whether the issue is minor (like a loose gas cap) or something that needs professional repair.
Step 5: Fix the Underlying Problem
Before resetting the light, address the cause of the code. For instance:
- If the code is P0455 (evaporative emissions leak), check and tighten your gas cap.
- If it’s P0301 (cylinder 1 misfire), inspect the spark plug and ignition coil.
- If it’s P0133 (O2 sensor slow response), consider replacing the sensor.
Fixing the problem ensures the light won’t return immediately after reset.
Step 6: Clear the Codes and Reset the Light
Once the issue is resolved, use the scanner to clear the trouble codes. Most scanners have a “Clear Codes” or “Erase DTCs” option. Select it and confirm.
After clearing, the check engine light should turn off. If it doesn’t, double-check that the scanner successfully communicated with the car and that the code was cleared.
Step 7: Verify the Reset
Start your car and observe the dashboard. The check engine light should remain off. If it comes back on, the problem may not be fully resolved, or a new issue has been detected.
Method 2: Disconnecting the Battery (Alternative Method)
If you don’t have an OBD2 scanner, you can reset the check engine light by disconnecting the car’s battery. This method forces the car’s computer (ECU) to reset, clearing stored codes and turning off the light. However, it comes with some drawbacks.
Step 1: Turn Off the Engine and Remove the Key
Make sure the car is off and the key is out of the ignition. This prevents any electrical damage during the process.
Step 2: Locate the Battery
Open the hood and find the battery. On the 2013 Altima, it’s located on the right side of the engine bay, near the front.
Step 3: Disconnect the Negative Terminal
Using a socket wrench or pliers, loosen the nut on the negative (black) battery terminal. Carefully remove the cable and set it aside, making sure it doesn’t touch the battery post.
Important: Always disconnect the negative terminal first to avoid short circuits.
Step 4: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes. This allows the ECU to fully discharge and reset. Some recommend up to 30 minutes for a complete reset.
Step 5: Reconnect the Battery
Reattach the negative terminal and tighten the nut securely. Make sure the connection is tight to prevent electrical issues.
Step 6: Start the Car
Turn the ignition to “ON” and then start the engine. The check engine light should be off. If it returns, the underlying issue hasn’t been fixed.
Drawbacks of Battery Disconnection
While this method works, it has several downsides:
- It resets other systems, including radio presets, clock, and seat memory.
- It may trigger other warning lights (like ABS or airbag) temporarily.
- It doesn’t guarantee the light will stay off if the problem persists.
- Some modern cars require a relearn procedure after battery disconnect.
For these reasons, using an OBD2 scanner is strongly preferred.
Method 3: Drive Cycle Reset (Natural Reset)
In some cases, the check engine light will turn off on its own after the problem is fixed and the car completes a “drive cycle.” A drive cycle is a specific sequence of driving conditions that allows the car’s computer to retest emissions and engine systems.
What Is a Drive Cycle?
A drive cycle typically includes:
- Starting the engine when cold
- Driving at varying speeds (city and highway)
- Accelerating and decelerating smoothly
- Idling for a few minutes
- Turning off the engine after reaching operating temperature
The exact drive cycle for a 2013 Nissan Altima may vary, but a general pattern is:
- Start the car cold (hasn’t been driven for at least 8 hours).
- Drive at 30–40 mph for 5 minutes.
- Accelerate to 55 mph and maintain speed for 10 minutes.
- Decelerate to 20 mph without braking hard.
- Repeat acceleration and deceleration cycles.
- Idle for 2–3 minutes.
- Turn off the engine.
After completing this cycle, the ECU will recheck all monitored systems. If no faults are detected, the check engine light may turn off automatically.
How Long Does It Take?
This process can take several days of normal driving. The car must meet specific conditions (like engine temperature and speed) for the tests to run. If the light doesn’t turn off after a week of regular driving, the issue likely requires a manual reset or further diagnosis.
Troubleshooting Common Issues
Even after resetting the light, you might run into problems. Here’s how to handle common scenarios:
Check Engine Light Comes Back On
If the light returns shortly after resetting, the original problem hasn’t been fixed. Re-scan for codes and inspect the related components. For example:
- A recurring P0420 code may indicate a failing catalytic converter.
- A persistent P0300 code could mean worn spark plugs or a vacuum leak.
Other Warning Lights Appear
Disconnecting the battery can trigger other lights, such as the ABS or airbag warning. These usually reset after a few drive cycles. If they persist, use an OBD2 scanner to check for additional codes.
Car Runs Rough After Reset
If your Altima idles roughly or lacks power after a reset, the ECU may need time to relearn fuel trim and idle settings. Drive normally for 50–100 miles to allow the system to adapt.
Scanner Won’t Connect
If your OBD2 scanner fails to communicate:
- Ensure the ignition is on (engine off).
- Check that the OBD2 port is clean and undamaged.
- Try a different scanner or consult a mechanic.
When to See a Mechanic
While many check engine light issues can be resolved at home, some problems require professional attention. Seek a mechanic if:
- The light flashes (indicating a severe misfire that can damage the catalytic converter).
- You’re unable to read or interpret the trouble codes.
- The problem involves internal engine components (like timing belts or head gaskets).
- You lack the tools or confidence to perform repairs safely.
Ignoring a serious issue can lead to costly repairs or even engine failure.
Tips to Prevent Future Check Engine Light Issues
An ounce of prevention is worth a pound of cure. Follow these tips to keep your 2013 Altima running smoothly and avoid future check engine light surprises:
- Check your gas cap regularly: A loose or damaged cap is the #1 cause of emissions-related codes. Tighten it until it clicks three times.
- Follow the maintenance schedule: Replace spark plugs, air filters, and oxygen sensors as recommended in your owner’s manual.
- Use quality fuel: Low-quality gas can cause knocking and sensor errors.
- Listen for unusual sounds: Knocking, pinging, or rough idling can signal engine problems early.
- Keep the engine clean: Dirt and debris can affect sensor performance.
Regular care not only prevents check engine lights but also extends the life of your vehicle.
Conclusion
Resetting the check engine light on your 2013 Nissan Altima is a straightforward process—if you do it the right way. While disconnecting the battery or waiting for a drive cycle might work in some cases, the most effective and reliable method is using an OBD2 scanner. It allows you to diagnose the problem, fix it properly, and clear the code with confidence.
Remember, the check engine light is your car’s way of saying, “Hey, something’s not right.” Don’t ignore it. Address the root cause, reset the light safely, and keep up with maintenance to enjoy a smooth, worry-free drive.
With the steps and tips in this guide, you’re now equipped to handle the check engine light like a pro. Stay safe, stay informed, and keep your Altima running at its best.