Resetting the check engine light on a 2015 Chevy Equinox is possible after fixing the underlying issue. This guide walks you through safe methods, including using an OBD2 scanner or disconnecting the battery, with clear steps and expert tips.
Key Takeaways
- Diagnose the problem first: Never reset the light without identifying and fixing the root cause using an OBD2 scanner.
- Use an OBD2 scanner for best results: This tool reads error codes and allows you to clear the light safely and accurately.
- Battery disconnection is a temporary fix: While it may reset the light, it also erases vehicle settings and may not work on all models.
- Drive cycle completion is essential: After resetting, drive your Equinox through a complete drive cycle to ensure the system relearns and monitors properly.
- Monitor for recurring lights: If the check engine light returns, there’s likely an unresolved issue requiring professional diagnosis.
- Avoid quick fixes without repair: Simply clearing the light without fixing the problem can lead to emissions failures or engine damage.
- Keep records of repairs and resets: Documenting maintenance helps with future troubleshooting and resale value.
How to Reset Check Engine Light on 2015 Chevy Equinox
Seeing the check engine light illuminate on your 2015 Chevy Equinox dashboard can be stressful. It’s a warning that something in your vehicle’s engine or emissions system needs attention. While the light itself isn’t dangerous, ignoring it can lead to bigger problems down the road—like reduced fuel efficiency, engine damage, or failing an emissions test.
The good news? Once you’ve identified and fixed the issue, you can reset the check engine light yourself. This comprehensive guide will walk you through the safest and most effective ways to reset the light on your 2015 Chevy Equinox. You’ll learn how to use an OBD2 scanner, when disconnecting the battery might work, and what to do after the reset to ensure your vehicle runs smoothly.
Whether you’re a DIY enthusiast or just want to save a trip to the mechanic, this step-by-step guide will give you the confidence to handle the reset safely and correctly. Let’s get started.
Why the Check Engine Light Comes On
Before you reset 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 vehicle’s onboard diagnostics system (OBD2). This system constantly monitors sensors and components related to engine performance, fuel efficiency, and emissions.
Visual guide about How to Reset Check Engine Light on 2015 Chevy Equinox
Image source: lightcheckup.com
Common reasons the light may appear on a 2015 Chevy Equinox include:
- A loose or faulty gas cap
- Oxygen (O2) sensor failure
- Mass airflow (MAF) sensor issues
- Catalytic converter problems
- Spark plug or ignition coil failure
- Exhaust gas recirculation (EGR) valve malfunction
- Evaporative emissions system leaks
Some of these issues are minor and inexpensive to fix—like tightening a gas cap. Others, like a failing catalytic converter, can be costly and require professional repair. That’s why diagnosing the problem before resetting the light is critical.
Resetting the light without fixing the issue is like turning off a smoke alarm while your kitchen is still on fire. The light will likely come back on, and you could be ignoring a serious problem.
Tools You’ll Need
To reset the check engine light on your 2015 Chevy Equinox, you’ll need a few basic tools. The most effective method uses an OBD2 scanner, but we’ll also cover alternative approaches.
OBD2 Scanner (Recommended)
An OBD2 scanner is a handheld device that plugs into your vehicle’s diagnostic port. It reads trouble codes stored in the car’s computer and allows you to clear them. Many scanners also provide code definitions, live data, and readiness monitor status.
For the 2015 Chevy Equinox, any standard OBD2 scanner will work. You can find affordable options online or at auto parts stores. Popular brands include BlueDriver, Innova, and Autel. Some scanners connect via Bluetooth to your smartphone, while others have built-in screens.
Basic Hand Tools (For Battery Method)
If you plan to reset the light by disconnecting the battery, you’ll need:
- A wrench or socket set (usually 10mm)
- Safety gloves and glasses
- A memory saver (optional, to preserve radio and seat settings)
Owner’s Manual
Your 2015 Chevy Equinox owner’s manual contains valuable information about the OBD2 port location, fuse box, and reset procedures. Keep it handy during the process.
Step-by-Step: Resetting the Check Engine Light with an OBD2 Scanner
Using an OBD2 scanner is the most reliable and recommended way to reset the check engine light. It ensures the issue has been addressed and gives you detailed information about what triggered the light.
Step 1: Locate the OBD2 Port
The OBD2 port on the 2015 Chevy Equinox is located under the dashboard on the driver’s side. It’s usually near the steering column, about knee-level. You may need to crouch down to see it clearly.
The port is a 16-pin connector, typically black or gray, and shaped like a trapezoid. It’s easy to identify—just look for a rectangular plug with multiple pins inside.
Step 2: Turn Off the Engine
Make sure your vehicle is completely off before connecting the scanner. This prevents electrical issues and ensures accurate readings.
Step 3: Plug in the OBD2 Scanner
Insert the scanner’s plug into the OBD2 port. Push it in firmly until it clicks into place. Some scanners have a locking mechanism—make sure it’s secure.
Step 4: Turn the Ignition to “On”
Turn the key to the “On” position (but don’t start the engine). This powers up the vehicle’s computer and allows the scanner to communicate with it.
On most scanners, you’ll see a welcome screen or menu appear. Wait a few seconds for the device to initialize.
Step 5: Read the Trouble Codes
Use the scanner’s menu to select “Read Codes” or “Scan for Codes.” The device will retrieve any stored diagnostic trouble codes (DTCs) from the vehicle’s computer.
For example, you might see codes like P0420 (catalytic converter efficiency below threshold) or P0171 (system too lean). Write down the codes and use the scanner’s built-in database or an online resource to understand what they mean.
Step 6: Fix the Underlying Issue
Before resetting the light, address the problem indicated by the code. For instance:
- If the code is P0455 (large evaporative leak), check the gas cap and tighten or replace it.
- If it’s P0300 (random misfire), inspect spark plugs and ignition coils.
- If it’s P0135 (O2 sensor heater circuit), the sensor may need replacement.
Some fixes are simple and can be done at home. Others may require a mechanic. Never reset the light until the issue is resolved.
Step 7: Clear the Codes
Once the repair is complete, return to the scanner menu and select “Clear Codes” or “Erase DTCs.” Confirm the action when prompted.
The scanner will send a command to the vehicle’s computer to turn off the check engine light. You should see a confirmation message like “Codes Cleared” or “Reset Successful.”
Step 8: Turn Off the Ignition and Remove the Scanner
Turn the key back to the “Off” position and unplug the scanner from the OBD2 port. Store it safely for future use.
Step 9: Start the Engine
Start your Equinox and check the dashboard. The check engine light should be off. If it remains on or flashes, the issue may not be fully resolved, or a new problem has occurred.
Alternative Method: Resetting by Disconnecting the Battery
If you don’t have an OBD2 scanner, you can try resetting the check engine light by disconnecting the battery. This method forces the vehicle’s computer to reset, but it’s not always reliable and comes with drawbacks.
Step 1: Turn Off the Engine and Remove the Key
Make sure the vehicle is off and the key is out of the ignition. This prevents electrical surges or damage.
Step 2: Locate the Battery
The battery in the 2015 Chevy Equinox is under the hood, on the driver’s side. It’s a standard 12-volt lead-acid battery with positive (+) and negative (-) terminals.
Step 3: Disconnect the Negative Terminal
Use a wrench or socket to loosen the nut on the negative (black) battery cable. Carefully remove the cable from the terminal and tuck it away so it doesn’t touch metal.
Never disconnect the positive terminal first—this can cause sparks and damage the electrical system.
Step 4: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes. This allows the vehicle’s computer to fully discharge and reset. Some sources recommend up to 30 minutes for a complete reset.
Step 5: Reconnect the Battery
Reattach the negative cable to the battery terminal and tighten the nut securely. Make sure the connection is tight to avoid electrical issues.
Step 6: Start the Engine
Turn the key and start the vehicle. The check engine light may be off, but this isn’t guaranteed. The computer may take a few drive cycles to relearn settings and confirm the issue is resolved.
Drawbacks of the Battery Method
While disconnecting the battery can reset the light, it has several downsides:
- It erases stored data like radio presets, seat positions, and climate settings.
- It may not clear all trouble codes—especially on newer vehicles with advanced systems.
- It doesn’t confirm whether the original issue was fixed.
- It can trigger other warning lights or require a drive cycle to reset.
For these reasons, the OBD2 scanner method is strongly preferred.
What to Do After Resetting the Light
Resetting the check engine light is only the first step. To ensure your 2015 Chevy Equinox runs properly, follow these post-reset actions.
Complete a Drive Cycle
A drive cycle is a series of driving conditions that allow the vehicle’s onboard computer to run self-tests and confirm that repairs were successful.
For the 2015 Equinox, a typical drive cycle includes:
- Start the engine cold and let it idle for 2–3 minutes.
- Drive at a steady speed of 30–40 mph for 5–10 minutes.
- Accelerate to 55–60 mph and maintain speed for 10–15 minutes.
- Decelerate and come to a complete stop.
- Repeat the cycle 2–3 times over several days.
During this time, the computer will monitor systems like the catalytic converter, oxygen sensors, and evaporative emissions. If all tests pass, the readiness monitors will show “Complete.”
Check for Recurring Lights
After a few days of driving, check the dashboard. If the check engine light comes back on, the original problem may not be fully resolved. Use your OBD2 scanner to read new codes and investigate further.
Keep a Maintenance Log
Record the date of the reset, the trouble codes found, and the repairs made. This log helps track your vehicle’s health and can be useful during future diagnostics or when selling the car.
Troubleshooting Common Issues
Sometimes, resetting the check engine light doesn’t go as planned. Here are common problems and how to fix them.
Light Won’t Turn Off After Reset
If the light remains on after using an OBD2 scanner or disconnecting the battery, the issue likely wasn’t fixed. Re-scan for codes and double-check your repairs. Some problems, like a failing catalytic converter, require professional diagnosis.
Scanner Won’t Connect
If your OBD2 scanner won’t communicate with the vehicle:
- Ensure the ignition is in the “On” position.
- Check that the scanner is compatible with your vehicle.
- Inspect the OBD2 port for dirt or damage.
- Try a different scanner or have the port tested.
Other Warning Lights Appear
Disconnecting the battery can trigger other lights, like the ABS or airbag warning. These usually reset after a few drive cycles. If they persist, use a scanner to check for related codes.
Radio or Settings Reset
If you used the battery method and lost radio presets or seat memory, consult your owner’s manual to reconfigure them. Some systems require a specific sequence to restore settings.
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 flashes (indicating a severe misfire that can damage the catalytic converter).
- You’re unsure how to interpret or fix the trouble code.
- The problem involves complex systems like the transmission or emissions.
- You’ve tried resetting the light multiple times and it keeps returning.
- Your vehicle fails an emissions test.
A certified technician has advanced tools and expertise to diagnose and repair complex issues safely.
Preventing Future Check Engine Light Issues
The best way to avoid check engine light problems is through regular maintenance. Here’s how to keep your 2015 Chevy Equinox running smoothly:
- Replace spark plugs and ignition coils as recommended (usually every 100,000 miles).
- Use high-quality fuel and change the fuel filter regularly.
- Inspect and replace the air filter every 15,000–30,000 miles.
- Check the gas cap for cracks or wear and tighten it after every fill-up.
- Use a fuel system cleaner periodically to prevent carbon buildup.
- Follow the maintenance schedule in your owner’s manual.
Small habits—like tightening the gas cap—can prevent unnecessary check engine light activations.
Conclusion
Resetting the check engine light on your 2015 Chevy Equinox is a manageable task when you follow the right steps. Always start by diagnosing the problem with an OBD2 scanner, fix the underlying issue, and then clear the codes. While disconnecting the battery is an option, it’s less reliable and can cause other issues.
After resetting, complete a drive cycle and monitor your vehicle for any recurring problems. Keep records of repairs and maintain your Equinox regularly to prevent future light activations.
By taking a proactive approach, you’ll save money, extend your vehicle’s life, and drive with confidence. Remember: the check engine light is there to help you—don’t ignore it, and don’t just reset it without understanding why it came on.