Resetting the check engine light on a 2000 Ford Taurus can be done manually or with an OBD2 scanner. This guide walks you through both methods, explains why the light comes on, and helps you avoid common mistakes. Always diagnose the root cause first to prevent recurring issues.
Key Takeaways
- Diagnose the problem first: Never reset the light without identifying and fixing the underlying issue, such as a faulty oxygen sensor or loose gas cap.
- Use an OBD2 scanner for accuracy: This tool reads trouble codes and safely clears the light while confirming the repair was successful.
- Manual reset is possible but limited: Disconnecting the battery can reset the light, but it may also erase radio settings and require drive cycle completion.
- Drive cycles matter: After resetting, your car needs to complete specific driving patterns so the onboard computer can retest systems.
- Check gas cap regularly: A loose or damaged gas cap is one of the most common causes of a check engine light on older Ford models.
- Monitor after reset: If the light returns, the problem persists and requires further diagnosis.
- Prevent future issues: Regular maintenance like replacing spark plugs and air filters helps keep the engine running smoothly.
How to Reset Check Engine Light on 2000 Ford Taurus
If you’ve ever been driving your 2000 Ford Taurus and suddenly seen that dreaded yellow or orange “Check Engine” light flicker on, you’re not alone. It’s one of the most common—and most misunderstood—warning signals in any vehicle. But before you panic or rush to the mechanic, know this: sometimes, the fix is simpler than you think. And yes, you can reset that light yourself—safely and effectively—with the right tools and knowledge.
In this comprehensive guide, you’ll learn exactly how to reset the check engine light on your 2000 Ford Taurus. We’ll cover two proven methods: using an OBD2 scanner (the most reliable way) and manually resetting by disconnecting the battery (a quick fix with caveats). You’ll also learn why the light comes on in the first place, how to avoid common mistakes, and what to do if the light comes back on. Whether you’re a DIY enthusiast or just trying to save a few bucks on a repair bill, this guide has you covered.
Let’s get started—because understanding your car is the first step to keeping it running smoothly for years to come.
Why Does the Check Engine Light Come On?
Visual guide about How to Reset Check Engine Light on 2000 Ford Taurus
Image source: fordforum.com
Before you reset the light, it’s crucial to understand why it turned on 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). This system constantly monitors engine performance, emissions, and other critical systems. When it detects a problem, it triggers the light and stores a diagnostic trouble code (DTC) in the car’s computer.
On a 2000 Ford Taurus, common causes include:
- A loose or faulty gas cap (the most frequent cause)
- Faulty oxygen (O2) sensor
- Misfiring spark plugs or ignition coils
- Clogged or dirty mass airflow (MAF) sensor
- Failing catalytic converter
- Vacuum leaks in the intake system
- Exhaust gas recirculation (EGR) valve issues
Ignoring the light can lead to reduced fuel efficiency, increased emissions, and even engine damage over time. That’s why it’s essential to diagnose the issue before resetting the light. Resetting without fixing the problem is like turning off a smoke alarm while the fire still burns—it doesn’t solve anything.
Tools You’ll Need
Before you begin, gather the right tools. Here’s what you’ll need depending on the method you choose:
For OBD2 Scanner Method:
- OBD2 scanner (available at auto parts stores or online for $20–$50)
- Access to the OBD2 port (located under the dashboard, usually near the steering column)
- Your vehicle’s ignition key
For Manual Battery Disconnect Method:
- Wrench or socket set (typically 10mm for battery terminals)
- Safety gloves and glasses (optional but recommended)
- Your vehicle’s ignition key
Optional but Helpful:
- Flashlight (to see the OBD2 port clearly)
- Owner’s manual (for reference on fuse box and battery location)
- Notebook or phone to record trouble codes
Method 1: Resetting the Check Engine Light with an OBD2 Scanner
This is the most accurate and recommended way to reset the check engine light on your 2000 Ford Taurus. An OBD2 scanner not only clears the light but also reads the trouble codes, helping you understand what caused the issue in the first place.
Step 1: Locate the OBD2 Port
The OBD2 port is a 16-pin connector usually found under the dashboard on the driver’s side. In the 2000 Ford Taurus, it’s typically located below the steering wheel, near the fuse panel. You may need to crouch down or use a flashlight to see it clearly. It looks like a trapezoid-shaped plug with two rows of pins.
Step 2: Plug in the OBD2 Scanner
Turn off the ignition completely. Insert the scanner’s plug into the OBD2 port. Make sure it’s fully seated and secure. Most scanners will power on automatically when plugged in, but some may require you to turn the ignition to the “ON” position (without starting the engine).
Step 3: Turn the Ignition to “ON”
With the scanner plugged in, turn the key to the “ON” position. The dashboard lights should illuminate, but the engine should not start. This powers the car’s computer and allows the scanner to communicate with it.
Step 4: Read the Trouble Codes
Follow the scanner’s on-screen prompts to read the diagnostic trouble codes (DTCs). Most scanners will display codes like “P0420” or “P0171.” Write these down or take a photo—they’re essential for diagnosing the problem.
For example:
- P0420 = Catalytic converter efficiency below threshold
- P0171 = System too lean (bank 1)
- P0300 = Random/multiple cylinder misfire detected
Use the scanner’s built-in code definitions or search online for what each code means. This step helps you confirm whether the issue has been fixed before resetting the light.
Step 5: Clear the Codes and Reset the Light
Once you’ve addressed the underlying issue (e.g., tightened the gas cap, replaced a sensor), return to the scanner menu and select “Clear Codes” or “Erase DTCs.” Confirm the action when prompted.
The scanner will send a signal to the car’s computer to turn off the check engine light. You should see a confirmation message like “Codes Cleared” or “Reset Complete.”
Step 6: Turn Off the Ignition and Unplug the Scanner
Turn the key back to the “OFF” position and unplug the scanner. Wait about 30 seconds before starting the engine.
Step 7: Start the Engine and Verify
Start your Taurus and check the dashboard. The check engine light should be off. If it remains off after driving for a few minutes, the reset was successful.
Pro Tip:
Some scanners offer a “View Freeze Frame” feature, which shows the engine conditions (like RPM, speed, and temperature) at the moment the code was triggered. This can help you understand how the problem occurred.
Method 2: Manually Resetting the Check Engine Light by Disconnecting the Battery
If you don’t have an OBD2 scanner, you can reset the light by disconnecting the car battery. This method forces the car’s computer to reset, clearing stored trouble codes and turning off the check engine light. However, it’s not as precise as using a scanner, and it comes with some downsides.
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 or damage during the process.
Step 2: Locate the Battery
Open the hood and find the battery. In the 2000 Ford Taurus, it’s usually on the driver’s side of the engine bay. It’s a rectangular box with two cables attached: one red (positive) and one black (negative).
Step 3: Disconnect the Negative Terminal
Using a wrench or socket, loosen the nut on the negative (black) battery terminal. Carefully remove the cable and tuck it away from the battery so it doesn’t accidentally touch the terminal.
Important: Always disconnect the negative terminal first to avoid short circuits. Never disconnect the positive terminal first.
Step 4: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes—preferably 30. This gives the car’s computer (ECU) enough time to fully discharge and reset. The longer you wait, the more complete the 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: Turn On the Ignition and Check the Light
Turn the key to the “ON” position (without starting the engine). The check engine light should briefly illuminate as part of the system check, then turn off. If it stays off after starting the engine, the reset was successful.
Step 7: Start the Engine and Drive
Start your Taurus and let it idle for a few minutes. Then take it for a short drive to allow the computer to relearn driving patterns and complete its self-tests.
Important Notes:
- This method may reset other systems, including radio presets, clock, and anti-theft settings. You may need to reprogram these.
- The check engine light may come back on if the underlying issue wasn’t fixed.
- Some vehicles require a “drive cycle” to fully reset emissions monitors. We’ll cover that next.
Understanding Drive Cycles and Why They Matter
After resetting the check engine light—whether with a scanner or battery disconnect—your car’s computer needs to run a series of self-tests called “drive cycles.” These tests ensure that all emissions and engine systems are working properly.
On a 2000 Ford Taurus, a typical drive cycle includes:
- Starting the engine when cold (below 160°F)
- Driving at steady speeds (30–55 mph) for 5–10 minutes
- Including both highway and city driving
- Allowing the engine to reach normal operating temperature
- Stopping and restarting the engine at least once
The computer monitors sensors like the O2 sensor, catalytic converter, and EGR valve during this process. If all tests pass, the system confirms no issues exist. If a problem is detected, the check engine light will return.
Tip: If you’ve recently passed an emissions test or reset the light, completing a full drive cycle helps ensure your car is ready for inspection.
Troubleshooting: What If the Light Comes Back On?
If the check engine light returns after resetting, it means the underlying problem wasn’t fixed. Here’s what to do:
1. Recheck the Gas Cap
A loose, cracked, or missing gas cap is the #1 cause of a check engine light on older Fords. Remove the cap, inspect it for damage, and reinstall it tightly. Wait a few days—sometimes the light turns off after a few drive cycles.
2. Use the OBD2 Scanner Again
Plug in your scanner and read the new trouble codes. Compare them to the original ones. Are they the same? If so, the repair wasn’t effective. Are they different? A new issue may have developed.
3. Inspect Common Problem Areas
Based on the code, check:
- Spark plugs and wires (common on high-mileage Tauruses)
- O2 sensors (usually located in the exhaust manifold)
- Mass airflow sensor (clean with MAF cleaner if dirty)
- Vacuum hoses (look for cracks or leaks)
4. Consult a Mechanic if Needed
If you’re unable to diagnose or fix the issue, take your Taurus to a trusted mechanic. Some problems—like a failing catalytic converter—require professional tools and expertise.
Preventing Future Check Engine Light Issues
The best way to avoid check engine light problems is through regular maintenance. Here are some tips to keep your 2000 Ford Taurus running smoothly:
- Replace spark plugs every 30,000–50,000 miles. Worn plugs cause misfires and trigger the light.
- Use quality fuel and add a fuel system cleaner every 5,000 miles. This helps prevent carbon buildup.
- Check and tighten the gas cap after every fill-up. It’s a simple habit that prevents false alarms.
- Replace the air filter every 12,000–15,000 miles. A dirty filter reduces airflow and engine efficiency.
- Inspect vacuum hoses annually. Cracked hoses cause lean codes and performance issues.
- Use an OBD2 scanner periodically. Even if the light isn’t on, you can check for pending codes.
Conclusion
Resetting the check engine light on your 2000 Ford Taurus doesn’t have to be intimidating. Whether you use an OBD2 scanner for precision or disconnect the battery for a quick fix, the key is to always address the root cause first. Ignoring the problem won’t make it go away—it’ll only lead to bigger repairs down the road.
By following this guide, you’ve learned how to safely reset the light, understand what the codes mean, and take steps to prevent future issues. Remember: the check engine light is your car’s way of saying, “Hey, something’s not right.” Listen to it, fix it, and reset it with confidence.
With regular maintenance and a little know-how, your Taurus can stay reliable and efficient for many more miles. So the next time that light flickers on, you’ll know exactly what to do.