This guide walks you through how to reset the check engine light on a 2013 Chevy Impala using an OBD2 scanner, manual methods, and built-in vehicle diagnostics. You’ll also learn when it’s safe to reset the light and why fixing the root cause is essential.
Key Takeaways
- Always diagnose the problem first: The check engine light signals an issue—resetting it without fixing the cause will only make it reappear.
- Use an OBD2 scanner for accuracy: This tool reads trouble codes and safely clears the light after repairs.
- Manual reset methods may work temporarily: Disconnecting the battery or using the gas pedal trick can reset the light but aren’t reliable long-term solutions.
- Ensure the engine is off during procedures: Safety is key—never attempt resets while the engine is running.
- Monitor the light after reset: If it returns, the underlying issue hasn’t been resolved and requires further attention.
- Regular maintenance prevents future warnings: Keeping up with oil changes, spark plugs, and air filters reduces the chance of triggering the light.
- Consult a professional if unsure: Complex issues like catalytic converter or oxygen sensor problems should be handled by a certified mechanic.
How to Reset Check Engine Light on 2013 Chevy Impala
If you’ve recently fixed an issue with your 2013 Chevy Impala and the check engine light is still on, you’re not alone. Many drivers face this frustrating situation—even after repairs, the warning light may linger, reminding you of a problem that’s already been resolved. The good news? Resetting the check engine light on your 2013 Chevy Impala is straightforward, especially when you follow the right steps.
In this comprehensive guide, you’ll learn exactly how to reset the check engine light on your 2013 Chevy Impala using safe, proven methods. We’ll cover everything from using an OBD2 scanner—the most reliable and recommended approach—to alternative manual techniques like disconnecting the battery or using the gas pedal trick. You’ll also discover why simply turning off the light isn’t enough and why diagnosing the root cause is essential before any reset.
Whether you’re a DIY enthusiast or just trying to save a trip to the mechanic, this guide will walk you through each step with clear instructions, practical tips, and troubleshooting advice. By the end, you’ll know not only how to reset the light but also how to keep it off for good.
Let’s get started.
Understanding the Check Engine Light
Visual guide about How to Reset Check Engine Light on 2013 Chevy Impala
Image source: i.ytimg.com
Before you reset the check engine light, it’s important to understand what it means and why it comes 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). When the car’s computer detects a problem with the engine, emissions system, or other critical components, it triggers the light to alert you.
On a 2013 Chevy Impala, the check engine light can illuminate for a wide range of reasons, from something as simple as a loose gas cap to more serious issues like a failing oxygen sensor or catalytic converter. The light may flash or stay solid:
– A solid check engine light usually indicates a minor issue that should be checked soon.
– A flashing light signals a severe problem, such as engine misfire, that could damage the catalytic converter if ignored.
Ignoring the light—or resetting it without addressing the cause—can lead to reduced fuel efficiency, poor performance, and costly repairs down the road. That’s why the first step in any reset process should always be diagnosing the problem.
Step 1: Diagnose the Problem First
You should never reset the check engine light without knowing why it came on. Resetting it prematurely is like turning off a fire alarm while the house is still burning—it doesn’t solve the problem.
Use an OBD2 Scanner to Read Trouble Codes
The most effective way to diagnose the issue is by using an OBD2 (On-Board Diagnostics, Generation 2) scanner. This handheld device plugs into your car’s OBD2 port and reads the diagnostic trouble codes (DTCs) stored in the vehicle’s computer.
Here’s how to use it on your 2013 Chevy Impala:
- Locate the OBD2 port: In the 2013 Impala, the OBD2 port is usually found under the dashboard on the driver’s side, near the steering column. It’s a 16-pin connector that’s easy to spot once you know where to look.
- Turn the ignition to the “ON” position: You don’t need to start the engine—just turn the key to the second position (where the dashboard lights up).
- Plug in the OBD2 scanner: Insert the scanner’s connector into the port. Most scanners will power on automatically.
- Follow the scanner’s prompts: Use the buttons to navigate the menu and select “Read Codes” or a similar option.
- Record the trouble codes: The scanner will display one or more codes (e.g., P0420 or P0171). Write them down or take a photo for reference.
Once you have the codes, you can look them up online or in the scanner’s manual to understand what’s wrong. For example:
– P0420 = Catalyst system efficiency below threshold (likely a bad catalytic converter or oxygen sensor)
– P0171 = System too lean (Bank 1)—could be a vacuum leak or faulty mass airflow sensor
– P0442 = Evaporative emission control system leak (often a loose or damaged gas cap)
Common Causes of Check Engine Light in 2013 Chevy Impala
Based on owner reports and repair data, some of the most frequent triggers for the check engine light in the 2013 Impala include:
- Loose or damaged gas cap: This is the #1 cause of check engine lights. A loose cap allows fuel vapors to escape, triggering an evaporative emissions code.
- Faulty oxygen (O2) sensor: These sensors monitor exhaust gases and help the engine adjust the air-fuel mixture. A failing sensor can reduce fuel economy and increase emissions.
- Mass airflow (MAF) sensor issues: A dirty or malfunctioning MAF sensor can cause rough idling, hesitation, and poor acceleration.
- Spark plug or ignition coil problems: Worn spark plugs or bad coils can lead to engine misfires, especially under load.
- Catalytic converter failure: Often caused by prolonged driving with misfires or rich fuel mixtures, a failing converter can trigger codes like P0420.
- Evaporative emissions system leaks: Small leaks in the EVAP system (hoses, valves, or charcoal canister) can set off codes like P0442 or P0455.
Once you’ve identified the issue, you can proceed with the appropriate repair. Only after the problem is fixed should you consider resetting the check engine light.
Step 2: Fix the Underlying Issue
Resetting the light without fixing the problem is a temporary fix at best. In most cases, the light will come back on within a few drive cycles if the root cause isn’t addressed.
Examples of Common Repairs
Let’s look at a few common scenarios and how to resolve them:
Scenario 1: Loose Gas Cap (Code P0442)
– Turn off the engine.
– Remove the gas cap and inspect it for cracks or damage.
– Tighten it firmly until you hear it click 3–5 times.
– Drive the car for 50–100 miles. In many cases, the light will turn off on its own after the system confirms the leak is fixed.
Scenario 2: Faulty Oxygen Sensor (Code P0135 or P0141)
– Locate the O2 sensor (usually on the exhaust manifold or downpipe).
– Disconnect the electrical connector and remove the sensor using an O2 sensor socket.
– Install a new sensor and reconnect the wiring.
– Clear the code and test drive.
Scenario 3: Dirty Mass Airflow Sensor (Code P0171 or P0101)
– Locate the MAF sensor (between the air filter box and throttle body).
– Disconnect the electrical connector.
– Remove the sensor and clean it with MAF cleaner spray (do not use compressed air or touch the wires).
– Reinstall and reconnect.
After completing the repair, it’s time to reset the check engine light.
Step 3: Reset the Check Engine Light Using an OBD2 Scanner (Recommended Method)
The safest and most reliable way to reset the check engine light on your 2013 Chevy Impala is by using an OBD2 scanner. This method ensures the system is properly cleared and gives you confirmation that the reset was successful.
Step-by-Step Instructions
- Ensure the engine is off: Turn the key to the “OFF” position and remove it from the ignition.
- Plug in the OBD2 scanner: Insert the scanner into the OBD2 port under the dashboard.
- Turn the ignition to “ON”: Do not start the engine—just turn the key to the second position so the dashboard lights up.
- Power on the scanner: Most scanners will turn on automatically when connected.
- Navigate to the “Clear Codes” or “Erase Codes” option: Use the menu buttons to find this function. It may also be labeled “Reset MIL” or “Turn Off Check Engine Light.”
- Confirm the reset: The scanner will ask if you’re sure. Select “Yes” or “OK.”
- Wait for confirmation: The scanner will display a message like “Codes Cleared” or “MIL Off.”
- Turn off the ignition and unplug the scanner: Remove the key and disconnect the device.
After resetting, start the engine. The check engine light should be off. If it comes back on within a few minutes or after driving, the problem hasn’t been fully resolved.
Tips for Successful Reset
- Use a quality scanner: Basic code readers can clear codes, but advanced scanners offer better diagnostics and confirmation.
- Ensure the battery is charged: A weak battery can interfere with the reset process.
- Drive the car after reset: The vehicle’s computer needs to run through its self-tests (drive cycles) to confirm the issue is fixed.
Alternative Methods to Reset the Check Engine Light
If you don’t have an OBD2 scanner, there are a few alternative methods you can try. However, these are less reliable and may not work in all cases.
Method 1: Disconnect the Battery
Disconnecting the car battery can reset the vehicle’s computer and clear the check engine light. This method works because it cuts power to the engine control unit (ECU), forcing it to reset.
Step-by-Step Instructions
- Turn off the engine and remove the key: Ensure the car is completely off.
- Locate the battery: Open the hood and find the 12-volt battery (usually on the driver’s side).
- Disconnect the negative terminal: Use a wrench to loosen the nut on the negative (black) cable and remove it from the battery post. Always disconnect the negative first to avoid short circuits.
- Wait 15–30 minutes: This allows the ECU to fully discharge and reset.
- Reconnect the negative terminal: Tighten the cable securely.
- Start the engine: The check engine light should be off. If it returns, the issue persists.
Important Notes:
– This method may also reset other systems, such as the radio presets, clock, and adaptive transmission settings.
– Some vehicles require a relearn procedure after battery disconnect (e.g., throttle body relearn).
– Not all trouble codes can be cleared this way—especially if the problem is still present.
Method 2: Use the Gas Pedal Trick (Not Always Effective)
Some older GM vehicles respond to a “gas pedal dance” to reset the computer. While this method is rumored to work on some Impalas, it’s not officially supported and results vary.
How to Try the Gas Pedal Trick
- Turn the ignition to “ON” (do not start the engine).
- Press the gas pedal all the way down and hold it for 3–5 seconds.
- Release the pedal completely.
- Repeat this cycle 3 times within 10 seconds.
- Turn the ignition off and wait 30 seconds.
- Start the engine.
If the light is off, it may have worked. However, this method is inconsistent and not recommended as a primary solution.
Method 3: Drive the Car (Passive Reset)
In some cases, the check engine light will turn off on its own after the problem is fixed and the vehicle completes several drive cycles. A drive cycle is a sequence of driving conditions (cold start, acceleration, cruising, deceleration) that allows the ECU to test all systems.
How to Complete a Drive Cycle
- Start the engine when cold (after sitting overnight).
- Let it idle for 2–3 minutes.
- Drive at 30–40 mph for 5 minutes.
- Accelerate to 55 mph and cruise for 10 minutes.
- Decelerate and stop.
- Repeat 2–3 times over a few days.
If the issue is resolved, the light may turn off after 50–100 miles of driving. However, this method takes time and doesn’t guarantee a reset.
Troubleshooting: What to Do If the Light Comes Back On
If you’ve reset the check engine light but it returns after a few days or miles, the underlying problem hasn’t been fixed. Here’s what to do:
Recheck the Trouble Codes
Use your OBD2 scanner to read the codes again. Compare them to the original codes. Are they the same? If so, the repair may have been incomplete or incorrect.
Inspect Related Components
Sometimes, one faulty part can affect others. For example:
– A bad O2 sensor can damage the catalytic converter.
– A vacuum leak can cause multiple lean codes.
Check for Intermittent Issues
Some problems only occur under specific conditions (e.g., when the engine is hot or during hard acceleration). These can be harder to diagnose.
Consult a Professional Mechanic
If you’ve tried everything and the light keeps coming back, it’s time to visit a certified mechanic. They have advanced diagnostic tools and experience with 2013 Impala-specific issues.
Preventing Future Check Engine Light Issues
The best way to avoid dealing with the check engine light is to prevent it from coming on in the first place. Regular maintenance is key.
Follow the Maintenance Schedule
Refer to your owner’s manual for the recommended service intervals. For the 2013 Impala, this typically includes:
- Oil and filter change every 5,000–7,500 miles
- Air filter replacement every 15,000–30,000 miles
- Spark plug replacement every 100,000 miles
- Fuel system cleaning every 30,000 miles
- Inspect belts, hoses, and emissions components annually
Use Quality Fuel and Parts
Cheap fuel or aftermarket parts can cause sensor errors and performance issues. Stick to reputable brands and top-tier gasoline when possible.
Address Warning Signs Early
If you notice rough idling, reduced fuel economy, or hesitation, don’t wait—get it checked out. Early intervention can prevent bigger problems.
Conclusion
Resetting the check engine light on your 2013 Chevy Impala is a task most drivers can handle with the right tools and knowledge. The most effective method is using an OBD2 scanner to read the trouble codes, fix the underlying issue, and then clear the light. While manual methods like disconnecting the battery or using the gas pedal trick may work in some cases, they’re less reliable and not recommended as primary solutions.
Remember: the check engine light is your car’s way of asking for help. Ignoring it or resetting it without repairs can lead to more serious—and expensive—problems down the road. Always diagnose the issue first, make the necessary repairs, and then reset the light confidently.
By following this guide, you’ll not only reset the check engine light but also keep your 2013 Chevy Impala running smoothly for years to come. Stay proactive, stay informed, and drive with peace of mind.