Reset your Infiniti G37’s Service Engine Soon light in minutes using the OBD2 scanner method—simply plug it in, follow the prompts, and clear the code safely. For a quick alternative, try the battery disconnect method (15+ minutes) to reset the system, but ensure no active codes remain to avoid re-triggering the light. Always address underlying issues first for a permanent fix.

How to Reset Service Engine Soon Light Infiniti G37 2026 Guide

Key Takeaways

• Diagnose first: Always check for underlying issues before resetting the light.
• Use OBD2 scanner: Most reliable method to clear the service engine light.
• Manual reset: Turn ignition on/off 3 times to reset without tools.
• Battery disconnect: Temporarily disconnect battery to reset light (not recommended).
• Verify completion: Drive car post-reset to confirm light stays off.
• Address root cause: Resetting won’t fix unresolved mechanical problems.

Why This Matters / Understanding the Problem

You’re driving your sleek 2026 Infiniti G37 down the highway, and suddenly—*ding*—the Service Engine Soon light pops up on your dashboard. No loud noises, no smoke, just that little amber icon that instantly raises your blood pressure. Sound familiar?

This light isn’t always a sign of disaster. Sometimes, it’s just a routine reminder for maintenance like an oil change, cabin air filter swap, or spark plug check. But other times, it could point to a real issue—like a loose gas cap or a failing oxygen sensor.

Ignoring the Service Engine Soon light can lead to bigger (and costlier) repairs down the road. The good news? In many cases, once you’ve addressed the underlying issue—or completed scheduled maintenance—you can reset the light yourself. This How to Reset Service Engine Soon Light Infiniti G37 2026 Guide will walk you through the process safely, quickly, and without a trip to the dealership.

Whether you’re a DIY car enthusiast or just want to save time and money, knowing how to handle this light puts you back in control. And with the right tools and steps, it’s easier than you think.

What You Need

Before you start, gather these tools and materials. Most are already in your garage or can be found at any auto parts store. Having everything ready makes the process smooth and stress-free.

• OBD2 (On-Board Diagnostics) Scan Tool – A basic code reader or a more advanced scanner (like BlueDriver, Ancel, or even a smartphone-compatible Bluetooth adapter). This is essential for checking and clearing trouble codes.
• Owner’s Manual – For your 2026 Infiniti G37, to confirm dashboard symbols and reset procedures.
• Smartphone or Tablet (optional) – If using a Bluetooth OBD2 adapter, you’ll need a device with a compatible app (like Torque Pro or FIXD).
• Clean Rag – For wiping the OBD2 port if it’s dusty.
• Fully Charged Car Battery – Low voltage can interrupt the reset process or cause error messages.
• Notebook or Phone Notes App – To write down any diagnostic trouble codes (DTCs) you see before clearing them.

Pro Tip: Don’t skip the OBD2 scan! Even if you *think* the light is from a recent oil change, scanning first confirms the cause. Clearing the light without fixing the real issue could hide a serious problem.

Step-by-Step Guide to How to Reset Service Engine Soon Light Infiniti G37 2026 Guide

Follow these steps carefully. This method works for most 2026 Infiniti G37 models and ensures you’re not just masking a problem—you’re resolving it the right way.

Step 1: Park Safely and Turn Off the Engine

Pull over to a safe, flat area. Turn off your Infiniti G37 and remove the key (or press the power button to shut down the vehicle completely).

Engage the parking brake. This prevents the car from rolling and ensures all systems are powered down before you begin diagnostics.

Wait about 30 seconds. This allows the car’s computer system to fully reset, which helps the OBD2 tool connect properly.

Warning: Never work on a running engine or hot exhaust system. Safety first!

Step 2: Locate the OBD2 Port

In your 2026 Infiniti G37, the OBD2 port is typically found under the dashboard, just below the steering wheel and to the left of the driver’s knee.

It’s a 16-pin connector, usually black or gray, and may be covered by a small plastic door or flap. Gently pull it open.

If it’s dusty, wipe it clean with a dry rag. Dirt or debris can interfere with the connection.

Fun fact: Every car sold in the U.S. since 1996 has this same OBD2 port—so the process is nearly identical across brands. But the location can vary slightly. In the G37, it’s always driver-side lower dash.

Step 3: Connect Your OBD2 Scan Tool

Plug your OBD2 scanner directly into the port. Push it in until it clicks or feels secure.

If using a Bluetooth adapter, pair it with your smartphone or tablet via the app. Make sure your phone is charged and Bluetooth is on.

Turn the ignition to the “ON” position—but do not start the engine. You’ll see dashboard lights come on (including the Service Engine Soon light), but the engine stays off.

The scanner should power up automatically. Wait for it to establish a connection with the car’s ECU (Engine Control Unit). This usually takes 10–30 seconds.

Pro Tip: If the scanner doesn’t power on, check the ignition position. Some tools require the key to be in “ON” but not cranking.

Step 4: Read and Record Diagnostic Trouble Codes (DTCs)

On your scanner, select “Read Codes” or “Check DTCs.” The tool will communicate with your Infiniti’s computer and pull any stored codes.

Common codes for the Service Engine Soon light include:

• P0420 – Catalyst efficiency below threshold (catalytic converter issue)
• P0455 – Evaporative emissions system leak (often a loose gas cap)
• P0300–P0306 – Random or cylinder-specific misfire
• P0171 / P0174 – System too lean (fuel mixture problem)

Write down every code you see. This is crucial—especially if you plan to fix the issue yourself or discuss it with a mechanic later.

Some scanners also show a description or severity level. Use this to prioritize repairs. For example, a P0455 (loose gas cap) is easy to fix; a P0420 may require professional diagnosis.

Remember: The How to Reset Service Engine Soon Light Infiniti G37 2026 Guide isn’t just about clearing the light—it’s about understanding what caused it.

Step 5: Address the Root Cause (If Needed)

Now comes the important part: fixing the problem before resetting the light.

Here are common fixes based on typical codes:

• Loose or faulty gas cap: Tighten it until it clicks 3–4 times. Or replace it with a new OEM cap ($15–$30). This often resolves P0455/P0456 codes.
• Recent maintenance (oil change, tire rotation): If you just had service done, the light may be a reminder. Check your service history and verify all tasks were completed.
• Misfire codes (P0300 series): Could be bad spark plugs, ignition coils, or fuel injectors. Replace spark plugs if due (every 60,000 miles on G37). Coil-on-plug systems make this easier.
• Oxygen sensor (P0130–P0167): Often needs replacement. A mechanic can test with a multimeter or oscilloscope.
• EVAP system leak: Inspect hoses, charcoal canister, and purge valve. Small cracks in rubber lines are common culprits.

Only after you’ve addressed the issue (or confirmed it was a routine maintenance reminder) should you proceed to reset.

Warning: Don’t clear the code and hope it stays off. If the problem isn’t fixed, the light will return—often within a few miles. And some states require emissions systems to pass inspection with no active codes.

Step 6: Clear the Service Engine Soon Light

Once you’ve fixed the issue (or confirmed it was maintenance-related), go back to your OBD2 scanner.

Select “Clear Codes” or “Erase DTCs.” Confirm when prompted.

The scanner will send a command to the ECU to delete stored codes and turn off the warning light.

You should see the Service Engine Soon light go off immediately or within a few seconds.

If using a Bluetooth tool, the app may show a confirmation message like “Codes Cleared Successfully.”

Some advanced scanners also let you reset readiness monitors—important if you’re preparing for a smog check. But that’s optional for most drivers.

Pro tip: After clearing, wait 30 seconds, then turn the ignition off and back to “ON” again. This verifies the light stays off.

Step 7: Test Drive and Monitor

Start your Infiniti G37 and take it for a short drive—about 10–15 minutes, including city and highway speeds.

Drive normally. The ECU uses real-world driving data to confirm the fix worked.

After the drive, check the dashboard. The Service Engine Soon light should remain off.

For added peace of mind, plug the scanner back in and run another “Read Codes” check. If no codes appear, you’re good to go.

Pro Tip: Some systems take a few drive cycles to fully reset. If the light comes back after 2–3 days, the issue wasn’t fully resolved. Revisit your diagnosis.

Step 8: Reset Maintenance Reminder (Optional)

Some 2026 Infiniti G37 models have a separate Maintenance Reminder System (MRS) that triggers the Service Engine Soon light after set intervals.

If you just had an oil change or tire rotation, you may need to reset the MRS manually—even after clearing the OBD2 code.

Here’s how:

1. Turn the ignition to “ON” (do not start engine).
2. Press and hold the “INFO” or “MENU” button on the dashboard or steering wheel.
3. Navigate to “Maintenance” or “Vehicle Settings.”
4. Select “Oil” or “Tires” (depending on what was serviced).
5. Choose “Reset” or “Reset Interval.”
6. Confirm when prompted.

This step is separate from the OBD2 reset but equally important. The MRS ensures future reminders are accurate.

Check your owner’s manual for exact steps—they vary slightly by trim level (Base, Journey, Sport, etc.).

Step 9: Keep a Maintenance Log

Write down:

• Date of service
• Type of service (oil change, spark plugs, etc.)
• Mileage
• Codes cleared
• Parts replaced (if any)

This helps track your car’s health and makes future diagnostics easier. It’s also great for resale value—buyers love well-maintained vehicles.

Use a notebook, phone app, or even a free online log like CarFax’s maintenance tracker.

Pro Tips & Common Mistakes to Avoid

Even simple tasks like resetting a dashboard light can go wrong if you rush. Here are insider tips and pitfalls to dodge.

✅ Pro Tips

• Use an OBD2 tool with freeze frame data: This shows exactly what the engine was doing (RPM, temperature, speed) when the code triggered. It’s a game-changer for diagnosing intermittent issues.
• Clear codes only after repairs: Think of it like turning off a fire alarm—only after the fire is out. Otherwise, you’re just silencing the warning.
• Check the gas cap first: It’s the #1 cause of false Service Engine Soon lights. Tighten it and drive 50 miles. If the light doesn’t return, problem solved!
• Use OEM parts when possible: Aftermarket spark plugs or oxygen sensors may not meet Infiniti’s specs, leading to repeat codes.
• Reset the MRS after every oil change: Even if the OBD2 code is gone, the MRS might trigger the light again in 3,000 miles unless reset.

❌ Common Mistakes

• Clearing codes without reading them first: You could miss a serious issue like a misfire or catalytic converter failure. Always read before you clear.
• Using a cheap, unreliable OBD2 scanner: Some knockoffs can’t communicate with Infiniti’s ECU or give false readings. Stick to reputable brands (Ancel, BlueDriver, Innova).
• Forgetting to turn the ignition to “ON”: The scanner won’t power up if the key is in “ACC” or off.
• Ignoring readiness monitors: If you’re in a state with emissions testing, the car must complete drive cycles to set monitors. Just clearing codes won’t help.
• Assuming the light is always maintenance-related: The Service Engine Soon light can mean emissions issues, fuel system problems, or sensor failures. Don’t assume—diagnose.

Real-Life Scenario: A driver cleared the light after an oil change but didn’t fix a cracked EVAP hose. The light returned in two days, and the mechanic found a $300 repair that could’ve been avoided with a $5 hose.

FAQs About How to Reset Service Engine Soon Light Infiniti G37 2026 Guide

Got questions? We’ve got answers—straight, practical, and no fluff.

Q1: Can I reset the Service Engine Soon light without a scan tool?

Short answer: Not reliably. Some older cars let you disconnect the battery, but modern Infiniti G37s store codes in non-volatile memory. Disconnecting the battery may reset the light temporarily, but the code will return.

Plus, it can reset other systems (radio presets, clock, seat memory). Always use an OBD2 scanner for a clean, safe reset.

Q2: How much does an OBD2 scanner cost?

Prices range from $20 to $150. A basic code reader (like the Ancel AD310) costs around $30 and works great for reading and clearing codes. Advanced scanners with live data and freeze frame cost $80–$150.

For most drivers, a mid-range tool is perfect. It’s a one-time investment that pays for itself after one dealership visit.

Q3: Will clearing the code pass emissions inspection?

Not necessarily. Most states require the car to have completed drive cycles after repairs. This means driving in specific conditions (cold start, highway, stop-and-go) so the ECU can test emissions systems.

Just clearing codes without driving properly can cause a failed inspection. Check your state’s requirements—some allow a “grace period” after repairs.

Q4: How long does it take for the light to reset after clearing?

Usually immediately. The light turns off as soon as the ECU receives the “clear codes” command. But if the underlying problem isn’t fixed, it will return—often within 10–50 miles.

Some systems take a few drive cycles to fully verify the fix. If the light comes back after 3 days, revisit the diagnosis.

Q5: What if the light comes back after resetting?

Don’t panic—but don’t ignore it either. The issue wasn’t fully resolved. Common reasons:

• Part wasn’t properly installed (e.g., loose spark plug)
• Faulty replacement part (aftermarket sensor)
• Multiple issues (e.g., bad gas cap AND misfire)
• Intermittent problem (e.g., wiring harness rubbing on engine)

Plug the scanner in again, read the new codes, and address them. If unsure, consult a trusted mechanic.

Q6: Can I use a free app instead of a physical scanner?

Yes—but only with a Bluetooth OBD2 adapter. Apps like Torque Pro, FIXD, or OBD Auto Doctor work well with smartphones.

Just make sure the adapter is compatible with Infiniti vehicles. Some cheap adapters only work with older OBD2 protocols.

Q7: Is the Service Engine Soon light the same as the Check Engine light?

Yes and no. On most modern cars, including the 2026 Infiniti G37, they’re the same system. “Service Engine Soon” is Infiniti’s branded name for the Check Engine Light (CEL).

Both use the same OBD2 codes and reset procedure. The difference is mostly in the dashboard icon and wording.

Final Thoughts

Resetting the Service Engine Soon light on your 2026 Infiniti G37 isn’t just about making a light go away—it’s about understanding your car and taking control of its health.

This How to Reset Service Engine Soon Light Infiniti G37 2026 Guide gives you the tools, steps, and confidence to handle it yourself. No more dealership bills. No more guessing games.

Remember: Read before you reset. Fix the cause, not just the symptom. And keep a maintenance log—it’s one of the smartest habits a car owner can have.

With a $30 OBD2 scanner and 15 minutes of your time, you can save hundreds and keep your G37 running smoothly for years.

So next time that light appears, don’t stress. Grab your scanner, follow these steps, and get back on the road with peace of mind. Your car—and your wallet—will thank you.

Drive safe, stay informed, and keep your Infiniti in top shape.