If you've ever seen a Check Engine light pop up on your dashboard, you're not alone. That little warning is your car's way of saying, Something's wrong! But before you panic or rush to a mechanic, there's a simple DIY solution: using an OBD2 scanner to read and clear those trouble codes. In this guide, we'll walk you through exactly how to clear codes on cars with a scanner, why it matters, and recommend a top-rated scanner to make the process even easier.

Why Clearing Car Codes with a Scanner Matters

First, let's demystify what those codes actually are. Diagnostic Trouble Codes (DTCs) are generated by your car's Engine Control Unit (ECU) when it detects issues, like a faulty sensor, a misfiring engine, or a problem with the emissions system. These codes are stored in your car's computer, and they're what trigger the Check Engine light.

Clearing these codes with a scanner is important for two reasons:

1. Confirm repairs work: After fixing a problem (say, replacing a broken oxygen sensor), clearing the code will turn off the warning light, proving the issue is resolved.

2. Avoid false alarms: Sometimes, temporary glitches (like a loose gas cap) trigger codes. Clearing them with a scanner can save you from a trip to the mechanic.

But here's the catch: Never clear codes without first identifying and fixing the root cause. Clearing a code without addressing the problem is like turning off a smoke alarm instead of putting out the fire—it will just come back.

Step-by-Step: How to Clear Codes on Cars with a Scanner

You don't need to be a car expert to do this. Follow these steps, and you'll be clearing codes like a pro in no time.

•Step 1: Gather Your Tools

- OBD2 Scanner: This is the star of the show. We highly recommend the VD70Lite Scanner (more on why later—it's perfect for beginners).

-Vehicle Manual: To find your car's OBD2 port (most cars built after 1996 have one).

- Smartphone (optional): If using a wireless scanner, you'll need it to connect via Bluetooth.

•Step 2: Locate the OBD2 Port

The OBD2 port is where you'll plug in your scanner. It's usually located:

- Under the dashboard, near the steering wheel (most common).

- Under the center console.

- Inside the glove box.

Check your vehicle manual for the exact spot—look for a trapezoidal 16-pin connector.

• Step 3: Connect the Scanner

1. Turn off your car's engine and remove the key from the ignition (for safety).

2. Plug the scanner's connector into the OBD2 port. You should feel a slight click when it's secure. (like the VD70Lite)

3. For wireless scanners: Turn on the scanner, enable Bluetooth on your phone, and pair it with the device via the scanner's app.

•Step 4: Power Up the Car (But Don't Start It)

Insert the key and turn it to the ON position—this powers the car's electrical system without starting the engine. You'll see the dashboard lights turn on, and your scanner should power up automatically (if not, press the Power button).

•Step 5: Read the Codes First

Before clearing codes, always read them first—you need to know what you're dealing with!

- On most scanners, press the Scan or Read Codes button.

- Wait 10–30 seconds.

- Write down the codes (e.g., P0300, P0171) and their descriptions—this helps diagnose the problem later.

•Step 6: Clear the Codes

Once you've fixed the issue (or confirmed it's a false alarm), it's time to clear the codes:

1. On the scanner, look for a Clear Codes, Erase, or Reset button.

2. Select Yes when prompted to confirm.

3. Wait for the scanner to finish. It will display Codes Cleared or Success when done.

•Step 7: Verify the Codes Are Gone

Don't skip this!

1. Press Scan again to check for remaining codes. If it says No Codes Found, you're good.

2. Turn off the car, unplug the scanner, and wait 30 seconds.

3. Restart the engine. The Check Engine light should be off—if not, the problem wasn't fixed, and you'll need to repeat the process.

Why We Recommend the VD70Lite Scanner

Not all scanners are created equal. The VD70Lite Scanner stands out for beginners and seasoned DIYers alike—and it's the best tool to use when learning how to clear codes on cars with a scanner. Here's why:

1. Ease of Use: Simplifying Diagnostic Barriers

Intuitive Interaction - inch touchscreen + modular UI (Auto Scan for one-click full-system diagnosis). No professional expertise needed—vehicle owners/beginners finish 3-step diagnostics effortlessly.

2. Functionality: Covering Core Repair Needs

Full OBD II Diagnostics： Complete support for code reading, clearing, 8 1 live data streaming, and frozen frame retrieval. Pinpoints engine/emission faults in seconds.

31 Special Functions： Covers high-frequency repair tasks (e.g., oil reset, TPMS reset, gearbox matching). Solves 90% of household vehicle/routine fault scenarios with one device.

3. Specialty: Delivering Unique Value

Protocol & Compatibility： Supports CAN FD/DOIP for 1996 + vehicles. Integrated OB15 - VAG cable design ensures plug - and - diagnose convenience, even for older models.

Smart Assistance rear camera + Service Center (remote support). Capture complex faults for expert help—ideal for novice repairers to access professional guidance remotely.

FAQs: How to Clear Codes on Cars with a Scanner

Still have questions? We've got answers.

Q: Can I clear codes without fixing the problem?

A: Technically, yes, but the Check Engine light will likely return. Always fix the issue first!

Q: Will clearing codes reset my car's computer?

A: It resets the stored DTCs, but not the entire computer. Your car's settings (like radio presets) will stay the same.

Q: How long does it take for cleared codes to reset?

A: Most cars reset immediately, but some need 50–100 miles of driving to complete a drive cycle and confirm no issues.

Q: Do I need a scanner for every car?

A: No. Most scanners (including the VD70Lite) work with multiple vehicles, as long as they're OBD2-compliant.

Final Thoughts

Learning how to clear codes on cars with a scanner is a game-changer for any car owner. It saves time, money, and the stress of dealing with mysterious warning lights. And with the right tool—like the VD70 Lite Scanner—it's easier than you think. Ready to take control of your car's health?