This guide walks you through how to reset the Nissan Murano engine light using simple methods, including OBD2 scanners and manual resets. You’ll also learn when it’s safe to reset the light and when to see a mechanic.
Key Takeaways
- Understand the cause first: Never reset the engine light without diagnosing the issue, as it could mask serious problems.
- Use an OBD2 scanner for accuracy: This tool reads trouble codes and safely clears the engine light after repairs.
- Manual reset methods exist but are limited: Some older Murano models allow a basic reset via the dashboard, but this doesn’t fix underlying issues.
- Battery disconnection is a last resort: Disconnecting the battery may reset the light, but it can also erase important vehicle settings.
- Monitor the light after reset: If the engine light returns, the problem hasn’t been resolved and requires professional attention.
- Regular maintenance prevents issues: Keeping up with oil changes, air filters, and spark plugs reduces the chance of engine light triggers.
- Know when to call a mechanic: Persistent or flashing lights indicate urgent problems that need expert diagnosis.
How to Reset Nissan Murano Engine Light: A Complete Step-by-Step Guide
If you’ve noticed the engine light glowing on your Nissan Murano’s dashboard, you’re not alone. The check engine light—also known as the malfunction indicator lamp (MIL)—is designed to alert you when the vehicle’s onboard computer detects a problem. While it can be alarming, it doesn’t always mean a major repair is needed. However, it’s important to take it seriously and address the root cause before resetting the light.
In this comprehensive guide, you’ll learn how to reset the Nissan Murano engine light safely and effectively. We’ll cover everything from understanding what triggers the light to using diagnostic tools, performing manual resets, and knowing when to seek professional help. Whether you’re a DIY enthusiast or just want to save a trip to the mechanic, this guide will equip you with the knowledge and confidence to handle the situation.
By the end of this article, you’ll know exactly how to reset the engine light on your Murano, what tools you’ll need, and how to prevent future warnings. Let’s get started.
What Is the Engine Light and Why Does It Come On?
Visual guide about How to Reset Nissan Murano Engine Light
Image source: seventrumpet.com
Before diving into the reset process, it’s essential to understand what the engine light means. The check engine light is part of your Murano’s onboard diagnostics system (OBD2), which monitors various sensors and systems in the engine, transmission, exhaust, and emissions.
When a sensor detects an anomaly—such as a misfire, faulty oxygen sensor, loose gas cap, or catalytic converter issue—the computer logs a trouble code and triggers the engine light. The light can appear in two forms:
– Steady (solid) light: Indicates a non-urgent issue that should be checked soon.
– Flashing light: Signals a serious problem, like a severe misfire that could damage the catalytic converter. In this case, stop driving and seek immediate help.
Common causes of the engine light in a Nissan Murano include:
– Loose or damaged gas cap
– Faulty oxygen (O2) sensor
– Mass airflow (MAF) sensor issues
– Spark plug or ignition coil problems
– Catalytic converter inefficiency
– Exhaust gas recirculation (EGR) valve malfunction
Ignoring the light can lead to reduced fuel efficiency, increased emissions, and even engine damage. That’s why diagnosing the issue before resetting the light is crucial.
Tools You’ll Need to Reset the Engine Light
To reset the engine light on your Nissan Murano, you’ll need one or more of the following tools, depending on the method you choose:
OBD2 Scanner (Recommended)
An OBD2 scanner is a handheld device that plugs into your vehicle’s diagnostic port (usually under the dashboard near the steering wheel). It reads trouble codes stored in the car’s computer and allows you to clear them after repairs. Many affordable scanners are available online or at auto parts stores, ranging from $20 to $100.
Basic Hand Tools
For manual methods like disconnecting the battery, you’ll need a wrench or socket set to remove the negative battery terminal.
Multimeter (Optional)
Useful for testing battery voltage and ensuring a clean reset when disconnecting the battery.
Owner’s Manual
Your Murano’s manual contains specific instructions for dashboard controls and reset procedures.
Smartphone with OBD2 App (Optional)
Some Bluetooth OBD2 scanners pair with smartphone apps (like Torque Pro or OBD Fusion), allowing you to read and clear codes from your phone.
Step-by-Step: How to Reset Nissan Murano Engine Light Using an OBD2 Scanner
Using an OBD2 scanner is the most reliable and recommended method for resetting the engine light. It ensures you’ve addressed the underlying issue and prevents accidental resets that could hide serious problems.
Step 1: Locate the OBD2 Port
The OBD2 port in your Nissan Murano is typically located under the dashboard on the driver’s side, near the steering column. It’s a 16-pin connector, usually black or gray, and may be behind a small cover. If you can’t find it, consult your owner’s manual.
Step 2: Turn Off the Ignition
Make sure the engine is off and the key is removed from the ignition. This prevents electrical issues when connecting the scanner.
Step 3: Plug in the OBD2 Scanner
Insert the scanner’s connector into the OBD2 port. It should fit snugly and only go in one way—don’t force it.
Step 4: Turn the Ignition to “On” (Do Not Start the Engine)
Turn the key to the “ON” position so the dashboard lights up, but don’t start the engine. This powers the scanner and allows it to communicate with the vehicle’s computer.
Step 5: Read the Trouble Codes
Follow the scanner’s instructions to retrieve the stored trouble codes. Most scanners will display codes like “P0420” or “P0171.” Write these down or take a photo for reference.
Step 6: Diagnose the Issue
Use the scanner’s built-in code definitions or search online to understand what each code means. For example:
– P0420: Catalytic converter efficiency below threshold
– P0171: System too lean (bank 1)
– P0300: Random/multiple cylinder misfire detected
Once you know the cause, decide whether you can fix it yourself (e.g., tightening the gas cap) or if you need professional help.
Step 7: Perform the Necessary Repair
Fix the issue before resetting the light. For example:
– Tighten or replace a loose gas cap
– Replace a faulty oxygen sensor
– Clean or replace the mass airflow sensor
– Replace spark plugs or ignition coils
Step 8: Clear the Codes and Reset the Light
After the repair, use the scanner’s “Clear Codes” or “Erase DTCs” function to reset the engine light. The scanner will send a command to the vehicle’s computer to turn off the light.
Step 9: Turn Off the Ignition and Remove the Scanner
Turn the key back to “OFF” and unplug the scanner.
Step 10: Start the Engine and Verify
Start your Murano and check the dashboard. The engine light should be off. If it comes back on, the problem may not be fully resolved, or a new issue has arisen.
Manual Reset Methods (Without a Scanner)
If you don’t have an OBD2 scanner, there are a few manual methods you can try. However, these are less reliable and should only be used if the issue is minor and confirmed resolved.
Method 1: Tighten or Replace the Gas Cap
A loose or damaged gas cap is one of the most common causes of the engine light. It can cause fuel vapors to escape, triggering an evaporative emissions code (like P0455 or P0457).
Steps:
- Turn off the engine and let the car cool.
- Open the fuel door and remove the gas cap.
- Inspect the cap for cracks, wear, or a damaged seal.
- Tighten the cap until you hear it click 3–5 times.
- If the cap is damaged, replace it with an OEM or compatible part.
- Drive the car for 50–100 miles. The light may turn off automatically after a few drive cycles.
Tip: Some Murano models have a “gas cap” warning light that appears first. If this light goes off but the engine light remains, the issue may be more serious.
Method 2: Disconnect the Battery (Last Resort)
Disconnecting the battery can reset the vehicle’s computer and clear the engine light. However, this method has drawbacks and should be used cautiously.
Steps:
- Turn off the engine and remove the key.
- Open the hood and locate the battery.
- Use a wrench to loosen the nut on the negative (black) terminal.
- Remove the negative cable and isolate it from the battery (e.g., wrap it in a cloth).
- Wait 15–30 minutes to allow the computer to fully reset.
- Reconnect the negative terminal and tighten it securely.
- Start the engine and check if the light is off.
Important Notes:
– This method may reset other systems, including radio presets, clock, and adaptive transmission settings.
– It does not fix the underlying problem—only clears the code temporarily.
– On some newer Murano models, the light may return after a few drive cycles if the issue persists.
Method 3: Use the Dashboard Reset Procedure (Limited Models)
Some older Nissan Murano models (pre-2010) allow a basic reset via the trip odometer or dashboard controls. This method is not available on all trims and does not clear trouble codes—only resets the maintenance reminder.
Steps (if applicable):
- Turn the ignition to “ON” (do not start the engine).
- Press and hold the trip odometer button.
- While holding the button, turn the ignition to “OFF” and back to “ON.”
- Continue holding the button until the odometer displays “0000” or a reset message.
- Release the button and turn off the ignition.
Caution: This method does not reset the engine light if a trouble code is active. It’s only for maintenance reminders.
Troubleshooting Common Issues After Reset
Even after resetting the engine light, you may encounter problems. Here’s how to handle them:
The Engine Light Comes Back On
If the light returns within a few days or after a short drive, the original issue wasn’t fully resolved. Possible reasons:
– The repair was incomplete (e.g., replaced a sensor but didn’t clear carbon buildup).
– A new issue has developed.
– The vehicle’s computer needs more drive cycles to confirm the fix.
Solution: Use an OBD2 scanner to check for new or recurring codes. Address the root cause or consult a mechanic.
The Light Flashes After Reset
A flashing engine light indicates a severe misfire or catalytic converter damage. Continuing to drive can cause expensive repairs.
Solution: Stop driving immediately. Have the vehicle towed to a repair shop for diagnosis and repair.
The Car Runs Poorly After Reset
If your Murano hesitates, idles roughly, or loses power after a reset, the engine may be in “limp mode” or the computer is relearning settings.
Solution: Drive gently for 50–100 miles to allow the computer to relearn fuel trims and sensor data. Avoid hard acceleration during this period.
Battery Disconnection Caused Other Issues
After disconnecting the battery, you may notice:
– Radio presets lost
– Clock reset
– Power windows not working properly
– Check engine light still on
Solution: Re-sync systems by following your owner’s manual. For example, some Muranos require a window reset procedure (lower and raise each window fully). If the engine light remains, use an OBD2 scanner to diagnose.
When to See a Mechanic
While many engine light issues can be resolved at home, some situations require professional help:
- The light is flashing: Indicates a serious misfire that can damage the catalytic converter.
- Multiple codes appear: Suggests a complex issue affecting several systems.
- You’re unsure of the cause: If you can’t diagnose the problem, a mechanic can perform a thorough inspection.
- The light returns after repair: The issue may be intermittent or require specialized tools to fix.
- You lack the tools or confidence: If you don’t have an OBD2 scanner or aren’t comfortable working on your car, it’s safer to seek help.
A certified Nissan technician can use advanced diagnostic equipment to pinpoint the issue and ensure your Murano runs safely and efficiently.
Preventing Future Engine Light Warnings
The best way to avoid engine light issues is through regular maintenance. Here are some tips to keep your Murano in top condition:
- Replace the air filter every 15,000–30,000 miles: A dirty filter reduces airflow and can trigger MAF sensor codes.
- Use quality fuel and additives: Clean fuel injectors and prevent carbon buildup.
- Change spark plugs as recommended: Typically every 60,000–100,000 miles, depending on the model.
- Inspect the gas cap regularly: Replace it if it’s cracked or doesn’t seal properly.
- Get regular oil changes: Use the correct oil grade and change it every 5,000–7,500 miles.
- Monitor dashboard warnings: Address minor issues before they become major problems.
By staying proactive, you can reduce the chances of unexpected engine light warnings and keep your Murano running smoothly for years.
Conclusion
Resetting the engine light on your Nissan Murano doesn’t have to be intimidating. With the right tools and knowledge, you can safely clear the warning and get back on the road. The key is to diagnose the problem first—never reset the light without understanding why it came on.
Using an OBD2 scanner is the most effective and reliable method. It allows you to read trouble codes, confirm repairs, and reset the light with confidence. Manual methods like tightening the gas cap or disconnecting the battery can work for minor issues, but they come with limitations and risks.
Remember, the engine light is your car’s way of communicating. Ignoring it or resetting it without fixing the cause can lead to bigger problems down the road. If you’re ever in doubt, don’t hesitate to consult a professional mechanic.
By following this guide, you’ll be well-equipped to handle engine light issues on your Nissan Murano. Stay safe, stay informed, and keep your vehicle in peak condition.