This guide walks you through step-by-step instructions to reset the engine light on your 2013 Ford Focus, whether you’re using an OBD2 scanner, disconnecting the battery, or using the built-in dashboard method. Always diagnose the root cause first to avoid recurring issues.
Key Takeaways
- Diagnose the issue first: Never reset the engine light without identifying and fixing the underlying problem, such as a loose gas cap or faulty oxygen sensor.
- Use an OBD2 scanner for accuracy: This is the most reliable and recommended method to clear codes and reset the light on your 2013 Ford Focus.
- Battery disconnection works but has drawbacks: While unplugging the battery can reset the light, it also erases radio settings, trip data, and adaptive learning in the ECU.
- Dashboard reset method is limited: Some 2013 Focus models allow a manual reset via the instrument cluster, but this only works for certain non-critical codes.
- Monitor after reset: Always drive your car for a few days after resetting to ensure the light doesn’t return, indicating the problem is truly resolved.
- Keep records of repairs: Document any fixes and codes cleared for future reference or resale value.
- Seek professional help if unsure: If the light comes back repeatedly, consult a certified mechanic to avoid potential engine damage.
How to Reset Engine Light on 2013 Ford Focus
If you’ve recently fixed an issue with your 2013 Ford Focus—like tightening a loose gas cap or replacing a faulty sensor—you might notice the dreaded “Check Engine” light is still glowing on your dashboard. Don’t panic. That light doesn’t always turn off automatically, even after the problem is resolved.
In this comprehensive guide, you’ll learn exactly how to reset the engine light on your 2013 Ford Focus using three proven methods: an OBD2 scanner, disconnecting the battery, and using the dashboard controls. We’ll also cover why the light came on in the first place, what to do if it keeps coming back, and how to avoid common mistakes.
Whether you’re a DIY enthusiast or just want to save a trip to the mechanic, this guide will help you take control of your car’s diagnostics safely and effectively.
Why the Engine Light Comes On
Visual guide about How to Reset Engine Light on 2013 Ford Focus
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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). It alerts you when the engine control unit (ECU) detects a problem that could affect performance, emissions, or fuel efficiency.
Common causes in the 2013 Ford Focus include:
- A loose or damaged gas cap (one of the most frequent culprits)
- Faulty oxygen (O2) sensors
- Misfiring spark plugs or ignition coils
- Issues with the catalytic converter
- Mass airflow (MAF) sensor problems
- Evaporative emissions system leaks
Ignoring the light can lead to reduced fuel economy, increased emissions, or even engine damage over time. That’s why diagnosing the root cause is the first and most important step before attempting any reset.
Method 1: Using an OBD2 Scanner (Recommended)
The most accurate and reliable way to reset the engine light on your 2013 Ford Focus is by using an OBD2 scanner. This handheld device reads diagnostic trouble codes (DTCs) stored in your car’s computer and allows you to clear them once the issue is fixed.
What You’ll Need
- An OBD2 scanner (basic models start around $20; Bluetooth versions work with smartphone apps)
- Your 2013 Ford Focus (engine off, but key in “ON” position or ignition on)
Step-by-Step Instructions
Step 1: Locate the OBD2 Port
The OBD2 port in your 2013 Ford Focus is usually located under the dashboard, near the driver’s side footwell. It’s a 16-pin connector, often black or gray, and may be tucked behind a small panel.
Tip: If you can’t find it, check near the steering column or behind a removable cover. Some models have it slightly to the left or right of center.
Step 2: Plug in the Scanner
Insert the OBD2 scanner into the port firmly. Make sure the connection is secure—loose plugs can cause communication errors.
Step 3: Turn the Ignition On
Turn the key to the “ON” position (but don’t start the engine). This powers up the car’s electrical system and allows the scanner to communicate with the ECU.
Step 4: Power On the Scanner
Turn on your OBD2 scanner. Most devices will automatically detect your vehicle and begin scanning. If prompted, select your car’s make, model, and year (Ford, Focus, 2013).
Step 5: Read the Trouble Codes
Navigate to the “Read Codes” or “Scan” option on the scanner. It will display one or more diagnostic trouble codes (DTCs), such as P0455 (large evaporative leak) or P0301 (cylinder 1 misfire).
Pro Tip: Write down the codes before clearing them. This helps you track what was fixed and ensures you’re addressing the right issue.
Step 6: Fix the Underlying Problem
Use the codes to identify the problem. For example:
- P0455 → Check gas cap and EVAP system
- P0301 → Inspect spark plugs, coils, or fuel injectors in cylinder 1
- P0171 → Look for vacuum leaks or MAF sensor issues
Fix the issue before proceeding. If you’re unsure, consult a repair manual or online forums specific to the 2013 Ford Focus.
Step 7: Clear the Codes
Once the problem is resolved, go back to the scanner menu and select “Clear Codes” or “Erase DTCs.” Confirm the action when prompted.
The scanner will send a signal to the ECU to reset the engine light. You should see a message like “Codes Cleared” or “Reset Successful.”
Step 8: Turn Off the Ignition and Remove the Scanner
Turn the key back to “OFF” and unplug the scanner. Start your car and check the dashboard. The engine light should be off.
Tips for Using an OBD2 Scanner
- Use a scanner with live data capability to monitor sensor readings in real time.
- Bluetooth scanners (like BlueDriver or FIXD) pair with your phone and offer detailed explanations of codes.
- Keep your scanner updated with the latest software for accurate diagnostics.
Method 2: Disconnecting the Battery
If you don’t have an OBD2 scanner, you can reset the engine light by disconnecting the car’s battery. This method forces the ECU to reset by cutting power, which clears stored codes and turns off the light.
Warning: This method is less precise and may erase other settings, so use it only if other options aren’t available.
What You’ll Need
- Wrench or socket set (usually 10mm for battery terminals)
- Safety gloves and glasses (optional but recommended)
- Your 2013 Ford Focus (parked, engine off, keys removed)
Step-by-Step Instructions
Step 1: Park Safely and Turn Off the Engine
Make sure your car is parked on a flat surface, the parking brake is engaged, and the engine is completely off. Remove the keys from the ignition.
Step 2: Locate the Battery
Open the hood and find the battery. In the 2013 Ford Focus, it’s typically on the right (passenger) side of the engine bay.
Step 3: Disconnect the Negative Terminal First
Using your wrench, loosen the nut on the negative (-) terminal (usually black cable). Remove the cable and tuck it away from the battery to prevent accidental contact.
Important: Always disconnect the negative terminal first to avoid short circuits.
Step 4: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes. This allows the ECU’s capacitors to discharge fully, ensuring a complete reset.
For a more thorough reset, wait up to 30 minutes.
Step 5: Reconnect the Battery
Reattach the negative terminal and tighten the nut securely. Then reconnect the positive (+) terminal (red cable).
Step 6: Start the Car
Turn the key to “ON” and wait a few seconds. Then start the engine. The dashboard lights will briefly illuminate, and the engine light should be off.
Drawbacks of Battery Disconnection
- Erases memory settings: Radio presets, clock, trip odometer, and seat positions may reset.
- Resets adaptive learning: The ECU relearns driving patterns, which may cause rough idle or poor fuel economy for a few days.
- Doesn’t guarantee permanent fix: If the underlying issue isn’t resolved, the light will return.
Method 3: Dashboard Reset (Limited Use)
Some 2013 Ford Focus models allow you to reset certain warning lights using the instrument cluster controls. However, this method only works for minor issues like a loose gas cap and won’t clear serious diagnostic codes.
Step-by-Step Instructions
Step 1: Turn the Ignition to “ON”
Insert the key and turn it to the “ON” position (do not start the engine).
Step 2: Press and Hold the Trip/Odometer Button
Locate the trip/odometer button on the dashboard (usually near the speedometer). Press and hold it.
Step 3: Turn the Ignition to “OFF” While Holding the Button
While still holding the button, turn the key back to “OFF.” Keep holding for about 10 seconds.
Step 4: Release and Turn Back to “ON”
Release the button, then turn the key back to “ON.” Watch the dashboard. If the reset works, the engine light may flash and then turn off.
Note: This method is inconsistent and not officially supported by Ford. It may work for temporary resets but won’t clear stored DTCs.
Troubleshooting: What If the Light Comes Back?
If the engine light returns after resetting, it means the underlying problem hasn’t been fixed. Here’s what to do:
1. Re-scan for Codes
Use your OBD2 scanner to read the new or recurring codes. Compare them to the original ones—this helps confirm if it’s the same issue or a new one.
2. Check Common Focus-Specific Issues
The 2013 Ford Focus has known problems, including:
- Transmission shudder or hesitation: Often linked to the PowerShift dual-clutch transmission. May trigger P0700 or P2700 codes.
- O2 sensor failures: Common in high-mileage models. Look for P0130–P0167 codes.
- Evaporative leaks: Faulty purge valve or cracked hoses can cause P0440–P0457 codes.
3. Inspect the Gas Cap
A loose, damaged, or missing gas cap is the #1 cause of engine lights in the Focus. Tighten it until it clicks 3–4 times. If the cap is cracked or the seal is worn, replace it (costs $15–$30).
4. Clear Codes and Test Drive
After repairs, clear the codes and drive normally for 50–100 miles. The ECU needs time to run self-tests and confirm the issue is resolved.
5. Visit a Mechanic if Needed
If the light persists, take your car to a Ford dealership or trusted mechanic. They have advanced tools to diagnose complex issues like transmission faults or internal engine problems.
Preventing Future Engine Light Issues
To avoid frequent engine light resets, follow these maintenance tips:
- Replace spark plugs every 60,000–100,000 miles. The 2013 Focus uses iridium plugs, which last longer but still wear out.
- Use quality fuel and fuel system cleaners. This helps prevent carbon buildup and sensor fouling.
- Inspect hoses and vacuum lines annually. Cracks or leaks can trigger EVAP or lean condition codes.
- Keep the gas cap tight and in good condition. Check it every time you refuel.
- Address warning lights promptly. Small issues can escalate into costly repairs if ignored.
Conclusion
Resetting the engine light on your 2013 Ford Focus is a straightforward process, but it should never be done without first diagnosing and fixing the root cause. The OBD2 scanner method is the most reliable and recommended approach, offering precise code reading and safe clearing. Battery disconnection is a backup option, while the dashboard reset is unreliable and limited.
Always monitor your car after a reset. If the light returns, don’t ignore it—persistent issues can lead to reduced performance, lower fuel economy, or even engine damage.
By following this guide, you’ll save time, money, and stress while keeping your Focus running smoothly. Remember: a reset is not a repair. Fix the problem, then clear the light—your car (and your wallet) will thank you.