Discover how to reset the engine light on your Infinity G35 using simple methods like OBD2 scanners, battery disconnection, or manual procedures. This guide covers everything you need to clear check engine codes and keep your car running smoothly.
Key Takeaways
- Understand why the engine light comes on: The check engine light can signal anything from a loose gas cap to a serious engine issue. Diagnosing the root cause is essential before resetting.
- Use an OBD2 scanner for accurate results: A diagnostic tool reads trouble codes and safely resets the light without risking damage to your vehicle’s computer system.
- Manual reset methods work but have limitations: Disconnecting the battery or using the gas pedal trick can clear the light, but they may not address underlying problems.
- Always fix the problem first: Resetting the light without repairing the issue will only cause it to return, potentially leading to more damage.
- Know when to visit a mechanic: If the light returns after resetting or flashes, it indicates a serious problem that requires professional diagnosis.
- Regular maintenance prevents future warnings: Keeping up with oil changes, air filters, and spark plugs reduces the chances of triggering the engine light.
- Keep a reset log for tracking: Document when you reset the light and what repairs were done to help monitor your G35’s health over time.
How to Reset Engine Light Infinity G35: A Complete Step-by-Step Guide
Is the check engine light glowing on your Infinity G35 dashboard? Don’t panic—it’s a common issue, and in many cases, it’s something you can resolve at home. Whether you’ve just fixed a minor problem like a loose gas cap or completed a repair on your oxygen sensor, you’ll want to reset the engine light to confirm everything is working properly. This guide will walk you through multiple safe and effective ways to reset the engine light on your Infinity G35, from using professional tools to simple DIY tricks.
In this comprehensive how-to guide, you’ll learn why the engine light comes on, how to diagnose the issue, and the best methods to reset it. We’ll cover everything from using an OBD2 scanner to manual techniques like disconnecting the battery. You’ll also get practical tips, troubleshooting advice, and answers to frequently asked questions. By the end, you’ll feel confident handling the check engine light like a pro—no mechanic visit required (unless it’s really needed!).
Why Does the Check Engine Light Come On?
Before you reset the engine light on your Infinity G35, it’s important to understand what triggered it 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). It monitors various sensors and systems, including the engine, emissions, and fuel delivery. When something goes out of range, the computer stores a trouble code and lights up the warning.
Visual guide about How to Reset Engine Light Infinity G35
Image source: i.ytimg.com
Common causes include:
- A loose or faulty gas cap
- Faulty oxygen (O2) sensor
- Misfiring spark plugs or ignition coils
- Catalytic converter issues
- Mass airflow (MAF) sensor problems
- Exhaust gas recirculation (EGR) valve malfunction
Some issues are minor and easy to fix, like tightening the gas cap. Others, like a failing catalytic converter, can be expensive and require professional help. That’s why diagnosing the problem before resetting the light is crucial. Resetting without fixing the issue is like turning off a fire alarm while the house is still burning—it doesn’t solve the problem.
Tools You’ll Need to Reset the Engine Light
Depending on the method you choose, you may need different tools. Here’s a quick rundown of what’s commonly used:
OBD2 Scanner (Recommended)
An OBD2 scanner is the most reliable and accurate tool for reading and clearing trouble codes. It plugs into the diagnostic port under your dashboard and communicates directly with your car’s computer. Many affordable models are available online or at auto parts stores. Some even connect to your smartphone via Bluetooth.
Basic Hand Tools
If you’re using the battery disconnection method, you’ll need a wrench or socket set to remove the negative battery terminal. Make sure you have the right size—usually 10mm or 12mm for most G35 models.
Owner’s Manual
Your Infinity G35 owner’s manual contains valuable information about the check engine light, fuse locations, and reset procedures. Keep it handy for reference.
Pen and Paper (Optional)
Jot down the trouble codes before clearing them. This helps you track recurring issues and share information with a mechanic if needed.
Method 1: Using an OBD2 Scanner (Best Practice)
The OBD2 scanner method is the gold standard for resetting the engine light on your Infinity G35. It’s safe, fast, and gives you detailed information about what’s wrong. Here’s how to do it step by step.
Step 1: Locate the OBD2 Port
The OBD2 port is usually found under the dashboard on the driver’s side, near the steering column. In the Infinity G35, it’s typically positioned just below the fuse box, about knee-level. It’s a 16-pin connector that looks like a trapezoid. If you can’t find it, check your owner’s manual for the exact location.
Step 2: Plug in the Scanner
Turn off the ignition, then plug the OBD2 scanner into the port. Make sure it’s securely connected. Some scanners power on automatically when plugged in; others require you to turn the ignition to the “ON” position (without starting the engine).
Step 3: Turn the Ignition On
Turn the key to the “ON” position. The dashboard lights should illuminate, but the engine should remain off. 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 instructions to retrieve the trouble codes. Most devices have a “Read” or “Scan” button. The scanner will display one or more codes, such as P0420 (catalytic converter efficiency) or P0171 (system too lean). Write these down for future reference.
Step 5: Interpret the Codes
Use the scanner’s built-in database or search online to understand what each code means. For example, P0455 often indicates a large evaporative emissions leak—commonly caused by a loose gas cap. Knowing the cause helps you decide whether to fix it yourself or seek professional help.
Step 6: Clear the Codes
Once you’ve addressed the issue (e.g., tightened the gas cap or replaced a sensor), return to the scanner and select the “Clear” or “Erase” option. The scanner will send a command to the car’s computer to reset the check engine light. You should see a confirmation message on the screen.
Step 7: Verify the Reset
Turn the ignition off, wait 10–15 seconds, then turn it back on. Check the dashboard—the engine light should be off. If it’s still on, the problem may not be fully resolved, or there could be additional codes. Re-scan to confirm.
Pro Tip: Some scanners offer live data monitoring, which lets you watch sensor readings in real time. This is especially useful for diagnosing intermittent issues.
Method 2: Disconnecting the Battery (Manual Reset)
If you don’t have an OBD2 scanner, disconnecting the battery is a common DIY method to reset the engine light. This cuts power to the car’s computer, forcing it to reset. However, it’s not as precise as using a scanner and may reset other systems like radio presets or clock settings.
Step 1: Turn Off the Engine and Remove the Key
Make sure the car is completely off and the key is out of the ignition. This prevents any electrical surges during the process.
Step 2: Locate the Battery
In the Infinity G35, the battery is located in the engine bay on the driver’s side. It’s a standard 12-volt lead-acid battery housed in a black plastic case.
Step 3: Disconnect the Negative Terminal
Use a wrench or socket to loosen the nut on the negative (-) battery terminal. Always disconnect the negative cable first to avoid short circuits. Once loose, carefully remove the cable and tuck it away from the battery post so it doesn’t accidentally reconnect.
Step 4: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes. This gives the car’s computer enough time to fully discharge and reset. Some experts recommend up to 30 minutes for a complete reset, especially if multiple systems were affected.
Step 5: Reconnect the Battery
Reattach the negative cable and tighten the nut securely. Make sure the connection is snug to prevent voltage drops or starting issues.
Step 6: Turn On the Ignition
Turn the key to the “ON” position and check the dashboard. The check engine light should be off. Start the engine and let it idle for a few minutes to allow the computer to relearn basic parameters like idle speed.
Note: This method may reset other systems, including the radio (which might require a code), climate control settings, and adaptive transmission learning. It also won’t tell you what caused the light in the first place—so use it only if you’ve already fixed the issue.
Method 3: The Gas Pedal Trick (Alternative Method)
Some Infinity G35 owners swear by the “gas pedal trick” to reset the engine light. This method involves a specific sequence of pressing the accelerator pedal to trigger a reset. While it’s not officially documented by Infiniti, many users report success—especially for minor emissions-related codes.
Step 1: Ensure the Car is Off
Make sure the engine is off and the key is removed from the ignition.
Step 2: Press the Gas Pedal Fully
Press the accelerator pedal all the way to the floor and hold it down for about 3–5 seconds. Release it completely.
Step 3: Repeat the Sequence
Repeat this process two more times: press fully, hold, release. Do this three times in total.
Step 4: Turn the Ignition On
Insert the key and turn the ignition to the “ON” position (do not start the engine). Wait about 10 seconds, then turn it off.
Step 5: Start the Engine
Start the car and check if the engine light is off. Let the engine run for a few minutes to see if the light returns.
Important: This method is not guaranteed to work for all codes or model years. It’s best used as a last resort or for very minor issues. Always verify with an OBD2 scanner if possible.
Method 4: Drive Cycle Reset (Natural Clearing)
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 series of driving conditions that allow the car’s computer to retest all monitored systems.
What Is a Drive Cycle?
A typical drive cycle for the Infinity G35 includes:
- Starting the engine cold and letting it idle for 2–3 minutes
- Driving at 30–40 mph for 5–10 minutes
- Accelerating to 55–60 mph and maintaining speed for several minutes
- Decelerating without braking (coasting)
- Repeating the cycle 2–3 times
How Long Does It Take?
Depending on the issue, the light may clear after one full drive cycle or take several days of normal driving. The computer needs to confirm that all systems are functioning within normal parameters.
Tip: Use an OBD2 scanner to check if monitors have completed. If they’re still “not ready,” the light won’t turn off until the drive cycle is finished.
Troubleshooting Common Issues
Even after resetting, the engine light may come back on. Here’s how to troubleshoot common problems:
Light Returns Immediately
If the light comes back on right after resetting, the issue wasn’t fully resolved. Re-scan for codes and double-check your repair. For example, if you tightened the gas cap but the light returns, the cap may be cracked or the seal damaged.
Light Flashes While Driving
A flashing check engine light indicates a severe problem, such as a misfire that could damage the catalytic converter. Pull over safely, turn off the engine, and have the car towed to a mechanic. Driving with a flashing light can cause expensive damage.
Multiple Codes Appear
If your scanner shows several codes, prioritize the most critical ones. For example, a P0300 (random misfire) is more urgent than a P0442 (small EVAP leak). Address them in order of severity.
Scanner Won’t Connect
If your OBD2 scanner won’t communicate with the car, check the fuse for the OBD2 port (usually in the fuse box under the dash). A blown fuse can prevent communication. Also, ensure the ignition is in the “ON” position.
Battery Disconnection Didn’t Work
If disconnecting the battery didn’t reset the light, the issue may be persistent or the computer may need more time to reset. Try driving the car for a few days or use an OBD2 scanner for a more reliable reset.
When to See a Mechanic
While many engine light issues can be handled at home, some require professional diagnosis and repair. Visit a certified mechanic if:
- The light flashes or stays on after resetting
- You notice performance issues like rough idling, stalling, or reduced power
- The scanner shows complex codes like P0420 (catalytic converter) or P0171 (fuel system)
- You’re unsure about the cause or how to fix it
- The problem involves the transmission, engine internals, or electrical system
Infiniti dealerships and independent shops with experience in Japanese luxury vehicles can provide accurate diagnostics and quality repairs.
Preventing Future Engine Light Issues
The best way to avoid resetting the engine light is to prevent it from coming on in the first place. Follow these maintenance tips to keep your Infinity G35 running smoothly:
Regular Oil Changes
Use high-quality synthetic oil and change it every 5,000–7,500 miles. Dirty oil can cause sensor malfunctions and engine wear.
Replace Air and Fuel Filters
A clogged air filter reduces engine efficiency and can trigger the MAF sensor. Replace it every 15,000–30,000 miles. Fuel filters should be changed according to the manufacturer’s schedule.
Check the Gas Cap
Always tighten the gas cap until it clicks three times after filling up. A loose cap is one of the most common causes of the check engine light.
Use Quality Fuel
Fill up at reputable stations to avoid contaminated fuel, which can damage sensors and injectors.
Inspect Spark Plugs and Coils
Replace spark plugs every 60,000–100,000 miles. Worn plugs can cause misfires and trigger the engine light.
Monitor Tire Pressure
While not directly related to the engine, low tire pressure can affect emissions and trigger other warning lights. Keep tires properly inflated.
Conclusion
Resetting the engine light on your Infinity G35 doesn’t have to be stressful or expensive. With the right tools and knowledge, you can safely clear the warning and get back on the road. Whether you use an OBD2 scanner, disconnect the battery, or try the gas pedal trick, always make sure the underlying issue is fixed first. Ignoring the problem won’t make it go away—it could lead to bigger repairs down the line.
Remember, the check engine light is your car’s way of saying, “Hey, something’s not right.” Listen to it, diagnose it, and address it promptly. By following this guide, you’ll not only reset the light but also gain confidence in maintaining your G35 for years to come. Keep your scanner handy, stay on top of maintenance, and drive with peace of mind.