Clearing the check engine light on your Dodge Dart doesn’t have to be intimidating. This guide walks you through safe, effective methods—from using an OBD2 scanner to driving cycles—so you can reset the light and keep your car running smoothly.
Key Takeaways
- Diagnose first: Never clear the check engine light without identifying the root cause using an OBD2 scanner or professional scan tool.
- Use the right tools: A quality OBD2 scanner compatible with your Dodge Dart (2013–2016) is essential for reading and clearing codes.
- Address the problem: Simply clearing the light won’t fix the underlying issue—repair the fault before resetting.
- Try a driving cycle: After repairs, complete a drive cycle to allow the vehicle’s computer to relearn and confirm the issue is resolved.
- Battery disconnect is a last resort: Disconnecting the battery can reset the light but may also erase radio settings and adaptive learning data.
- Prevent future lights: Regular maintenance like oil changes, air filter replacements, and spark plug checks reduce the chance of recurring issues.
- Seek professional help if needed: Persistent or complex codes (like P0300 for random misfires) may require expert diagnosis and repair.
How to Clear a Check Engine Light on Dodge Dart
If you’re driving a Dodge Dart and the check engine light suddenly pops on, don’t panic—but don’t ignore it either. That little amber glow on your dashboard is your car’s way of saying, “Hey, something’s not right.” Whether it’s a loose gas cap or a more serious engine issue, understanding how to properly diagnose and clear the check engine light on your Dodge Dart is essential for maintaining performance, fuel efficiency, and emissions compliance.
In this comprehensive guide, updated for 2026, we’ll walk you through every step of the process—from identifying the cause of the light to safely clearing it using proven methods. You’ll learn how to use an OBD2 scanner, perform a driving cycle, and even when it’s okay to try a battery reset. We’ll also cover common causes specific to the Dodge Dart, troubleshooting tips, and how to prevent the light from coming back.
By the end of this guide, you’ll have the confidence and knowledge to handle a check engine light like a pro—no mechanic required.
Why the Check Engine Light Comes On
Before you think about clearing the light, it’s important 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 Dodge Dart’s onboard diagnostics system (OBD2). This system constantly monitors engine performance, emissions, and various sensors.
When a problem is detected, the car’s computer stores a diagnostic trouble code (DTC) and triggers the light. These codes can range from minor issues like a loose gas cap (P0457) to more serious problems like a failing oxygen sensor (P0135) or engine misfire (P0300).
Common causes of the check engine light on a Dodge Dart include:
- Loose or damaged gas cap: One of the most frequent culprits. A missing or improperly sealed cap allows fuel vapors to escape, triggering an evaporative emissions code.
- Faulty oxygen (O2) sensor: These sensors monitor exhaust gases and help regulate the air-fuel mixture. A failing sensor can reduce fuel economy and increase emissions.
- Mass airflow (MAF) sensor issues: Dirt or damage to the MAF sensor can cause rough idling, poor acceleration, and reduced fuel efficiency.
- Spark plug or ignition coil problems: Misfires are common in high-mileage Darts and can lead to poor performance and increased emissions.
- Catalytic converter failure: Often a result of long-term neglect, a clogged converter can cause reduced power and fuel economy.
- Exhaust gas recirculation (EGR) valve malfunction: Can cause rough idle and increased NOx emissions.
The key takeaway? Never clear the check engine light without first diagnosing the issue. Clearing it without fixing the problem is like turning off a smoke alarm while your kitchen is on fire—it doesn’t solve anything.
Tools You’ll Need
To properly diagnose and clear the check engine light on your Dodge Dart, you’ll need a few basic tools. Most are affordable and easy to use, even for beginners.
OBD2 Scanner
This is the most important tool. An OBD2 scanner plugs into your car’s diagnostic port (usually under the dashboard near the steering column) and reads the trouble codes stored in the engine control unit (ECU). Look for a scanner that’s compatible with your Dart’s model year (2013–2016) and supports live data, code clearing, and readiness monitor checks.
Visual guide about How to Clear a Check Engine Light on Dodge Dart
Image source: dodgecheckenginelight.com
Smartphone with OBD2 App (Optional)
Many modern scanners connect to your phone via Bluetooth or Wi-Fi. Apps like Torque Pro (Android) or OBD Fusion (iOS) let you view real-time engine data, graph sensor readings, and clear codes—all from your phone. This is great for ongoing monitoring.
Screwdriver or Socket Set
You may need basic tools to access components like the air filter, spark plugs, or gas cap during diagnosis or repair.
Multimeter (Advanced Users)
If you’re troubleshooting electrical issues (like a faulty sensor), a multimeter helps test voltage, resistance, and continuity.
Owner’s Manual
Your Dodge Dart’s manual contains valuable information about the OBD2 port location, fuse box, and maintenance schedules.
Step-by-Step: How to Clear the Check Engine Light
Now that you understand the basics, let’s get into the actual process. Follow these steps carefully to safely and effectively clear the check engine light on your Dodge Dart.
Step 1: Locate the OBD2 Port
The OBD2 port is where you’ll plug in your scanner. On the Dodge Dart, it’s typically located under the dashboard on the driver’s side, just above the brake pedal. It’s a 16-pin connector, usually black or gray, and may be covered by a small plastic panel. If you can’t find it, check your owner’s manual—some models hide it behind a trim piece.
Step 2: Connect the OBD2 Scanner
Turn off the ignition, then plug the scanner into the OBD2 port. Make sure it’s fully seated. Next, turn the ignition to the “ON” position (but don’t start the engine). The scanner should power up and display a menu. If it doesn’t, check the connection or try a different scanner.
Step 3: Read the Trouble Codes
Navigate the scanner menu to “Read Codes” or “Scan for DTCs.” The device will communicate with the ECU and retrieve any stored trouble codes. These codes usually start with a letter (P, B, C, or U) followed by four digits (e.g., P0420). Write them down or take a photo—you’ll need them for diagnosis.
Step 4: Interpret the Codes
Use the scanner’s built-in code library or search online to understand what each code means. For example:
- P0457: Evaporative Emission Control System Leak Detected (loose gas cap)
- P0171: System Too Lean (Bank 1)—could indicate a vacuum leak or MAF sensor issue
- P0301: Cylinder 1 Misfire Detected
Some scanners provide plain-English descriptions, which makes this step much easier.
Step 5: Diagnose and Repair the Issue
This is the most critical step. Based on the code, perform the necessary repair. For example:
- If the code is P0457, tighten or replace the gas cap.
- If it’s P0171, inspect for vacuum leaks, clean the MAF sensor, or replace it.
- If it’s a misfire code (P0300–P0304), check spark plugs, ignition coils, and fuel injectors.
Always address the root cause before clearing the light. Skipping this step means the light will likely come back on within a few drive cycles.
Step 6: 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 ECU to reset the trouble codes and turn off the check engine light.
Step 7: Verify the Light Is Off
Turn off the ignition, wait 10 seconds, then restart the engine. If the repair was successful and the issue is truly resolved, the check engine light should remain off. If it comes back on, the problem may not be fully fixed—or a new issue has emerged.
Alternative Method: Battery Disconnect
If you don’t have an OBD2 scanner, you can try clearing the check engine light by disconnecting the battery. This method forces the ECU to reset, but it’s not recommended as a first option.
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.
Step 2: Disconnect the Negative Battery Terminal
Use a wrench to loosen the nut on the negative (black) battery cable. Carefully remove the cable and set it aside so it doesn’t touch the terminal.
Step 3: Wait 15–30 Minutes
This allows the ECU’s capacitors to discharge and the system to fully reset. Some sources recommend waiting up to an hour for a complete reset.
Step 4: Reconnect the Battery
Reattach the negative cable and tighten the nut securely. Start the engine and check if the light is off.
Important Notes
- This method may reset other systems, including radio presets, clock, and adaptive transmission settings.
- It does not fix the underlying problem—only use this if you’ve already repaired the issue.
- On some newer vehicles, disconnecting the battery can trigger additional warnings or require a relearn procedure.
Using a Driving Cycle to Confirm the Fix
After clearing the codes, your Dodge Dart’s computer needs to run a series of self-tests to confirm the issue is resolved. This is called a “drive cycle.” Completing a proper drive cycle ensures the check engine light stays off and that all emissions monitors are ready for inspection.
What Is a Drive Cycle?
A drive cycle is a specific sequence of driving conditions (cold start, idle, acceleration, deceleration, highway driving) that allows the ECU to test various systems like the catalytic converter, oxygen sensors, and evaporative emissions.
Recommended Drive Cycle for Dodge Dart
- Start the engine when it’s cold (hasn’t been run for at least 8 hours).
- Let it idle for 2–3 minutes.
- Drive at 25–35 mph for 3–5 minutes.
- Accelerate to 55–60 mph and maintain speed for 5–10 minutes.
- Decelerate gradually (without braking hard) to 20 mph.
- Repeat the acceleration and deceleration cycle 2–3 times.
- End with a 5-minute highway drive at steady speed.
Tips for Success
- Avoid turning off the engine during the cycle.
- Complete the drive within 30–45 minutes.
- If the light comes back on, use your scanner to check for new codes.
Troubleshooting Common Issues
Even after following all steps, you might run into problems. Here’s how to handle common scenarios.
The Light Comes Back On Immediately
If the check engine light returns right after clearing, the issue wasn’t fully resolved. Recheck your repair—especially gas caps, sensors, and electrical connections. Use your scanner to see if the same code reappears.
Scanner Won’t Connect
Ensure the ignition is on (but engine off). Check the OBD2 port for dirt or damage. Try a different scanner or cable. If the port is damaged, it may need professional repair.
Multiple Codes Appear
Some issues trigger multiple codes. For example, a failing MAF sensor can cause lean codes, misfires, and O2 sensor errors. Focus on the root cause—often the first code listed is the primary issue.
“Pending” vs. “Confirmed” Codes
Some scanners show “pending” codes—these are warnings that haven’t yet triggered the light. If you clear a pending code, the light may not come back unless the problem persists.
Preventing Future Check Engine Lights
The best way to deal with a check engine light is to avoid it altogether. Regular maintenance is your best defense.
Follow the Maintenance Schedule
Your Dodge Dart’s owner’s manual outlines recommended service intervals. Stick to them—especially for:
- Oil and filter changes (every 5,000–7,500 miles)
- Air filter replacement (every 15,000–30,000 miles)
- Spark plug replacement (every 60,000–100,000 miles, depending on type)
- Fuel system cleaning (every 30,000 miles)
Use Quality Fuel and Additives
Fill up at reputable stations and consider using a fuel system cleaner every 3,000–5,000 miles to prevent carbon buildup and injector clogging.
Check the Gas Cap Regularly
Make it a habit to ensure the gas cap is tight after every fill-up. A loose cap is one of the easiest fixes—and one of the most common causes of the light.
Listen to Your Car
Unusual noises, vibrations, or performance issues (like rough idle or hesitation) can signal a problem before the light comes on. Address them early.
When to See a Mechanic
While many check engine light issues can be handled at home, some problems require professional expertise.
Seek a mechanic if:
- The light is flashing (indicates a severe misfire that can damage the catalytic converter).
- You’re getting complex codes like P0300 (random misfire) or P0420 (catalyst efficiency below threshold).
- You’ve tried basic fixes but the light keeps returning.
- You’re not comfortable performing diagnostics or repairs.
A certified technician has advanced tools and experience to pinpoint tricky issues—like internal engine problems or wiring faults—that a basic scanner can’t detect.
Conclusion
Clearing the check engine light on your Dodge Dart doesn’t have to be a mystery. With the right tools—especially an OBD2 scanner—and a methodical approach, you can diagnose, repair, and reset the light safely and effectively. Remember: the light is a warning, not a death sentence. Address the root cause, complete a drive cycle, and maintain your car regularly to keep it running smoothly.
By following this 2026 guide, you’re not just turning off a light—you’re taking control of your vehicle’s health. Whether you’re a DIY enthusiast or just want to save on mechanic fees, these steps will help you stay confident behind the wheel.
So next time that amber glow appears, don’t panic. Grab your scanner, follow the steps, and get back on the road with peace of mind.