Resetting the engine light on a 2016 Dodge Dart doesn’t have to be complicated. This guide walks you through safe, effective methods—from using an OBD2 scanner to manual battery disconnection—while emphasizing the importance of diagnosing the root cause first.
Key Takeaways
- Diagnose before resetting: Never reset the engine light without identifying and fixing the underlying issue, such as a loose gas cap or faulty oxygen sensor.
- Use an OBD2 scanner for best results: This tool reads error codes and safely clears the light while preserving vehicle data.
- Battery disconnection is a temporary fix: While it may reset the light, it also erases radio settings and adaptive learning data.
- Check the gas cap first: A loose or damaged gas cap is one of the most common causes of the engine light in the 2016 Dodge Dart.
- Monitor after reset: If the light returns, the problem persists and requires professional diagnosis.
- Avoid cheap code readers: Invest in a reliable OBD2 scanner with clear instructions and compatibility with Dodge vehicles.
- Regular maintenance prevents issues: Routine checks of spark plugs, air filters, and emissions systems reduce the chance of future engine light triggers.
How to Reset Engine Light on 2016 Dodge Dart
If you’ve noticed the dreaded “Check Engine” light glowing on your 2016 Dodge Dart’s dashboard, you’re not alone. This warning light can appear for dozens of reasons—some minor, like a loose gas cap, and others more serious, like a failing catalytic converter. While it’s tempting to ignore it or hope it goes away, the engine light is your car’s way of saying, “Hey, something needs attention.”
The good news? Resetting the engine light on a 2016 Dodge Dart is straightforward—if you follow the right steps. But before you grab a wrench or unplug the battery, it’s crucial to understand that simply turning off the light won’t fix the problem. In fact, doing so without addressing the root cause could lead to bigger issues down the road, including reduced fuel efficiency, engine damage, or even failing an emissions test.
In this comprehensive guide, you’ll learn how to safely and effectively reset the engine light on your 2016 Dodge Dart. We’ll cover multiple methods—from using an OBD2 scanner to manual battery disconnection—and explain when each is appropriate. You’ll also get practical tips for diagnosing common issues, troubleshooting problems, and preventing future engine light activations. Whether you’re a DIY enthusiast or just want to save a trip to the mechanic, this guide has you covered.
Why the Engine Light Comes On
Visual guide about How to Reset Engine Light on 2016 Dodge Dart
Image source: dodgecheckenginelight.com
Before diving into the reset process, it’s important to understand why the engine light might be on in the first place. The 2016 Dodge Dart, like all modern vehicles, is equipped with an onboard diagnostic system (OBD2) that monitors engine performance, emissions, and various sensors. When the system detects a problem, it triggers the Check Engine Light (CEL) and stores a diagnostic trouble code (DTC).
These codes range from minor to severe. For example:
– P0457: Evaporative emission control system leak (often a loose gas cap)
– P0300: Random/multiple cylinder misfire detected
– P0420: Catalyst system efficiency below threshold
– P0171: System too lean (bank 1)
Ignoring these codes can lead to decreased performance, higher emissions, and costly repairs. That’s why diagnosing the issue is the first—and most important—step before resetting the light.
Method 1: Use an OBD2 Scanner (Recommended)
The safest and most effective way to reset the engine light on your 2016 Dodge Dart is by using an OBD2 scanner. This handheld device plugs into your car’s diagnostic port and communicates with the vehicle’s computer to read error codes and clear the light.
Step 1: Locate the OBD2 Port
In the 2016 Dodge Dart, the OBD2 port is located under the dashboard on the driver’s side, near the steering column. It’s a 16-pin connector, usually black or gray, and may be tucked behind a small panel or covered by a plastic flap. You don’t need any tools to access it—just reach under the dash and feel for the port.
Step 2: Turn the Ignition to “On”
Do not start the engine. Instead, turn the key to the “ON” position (or press the start button without pressing the brake). This powers up the car’s electrical system and allows the scanner to communicate with the engine control unit (ECU).
Step 3: Plug in the OBD2 Scanner
Insert the scanner into the OBD2 port. Make sure it’s fully seated. Most scanners will power on automatically once connected.
Step 4: Read the Trouble Codes
Follow the scanner’s on-screen instructions to read the stored trouble codes. The device will display one or more codes (e.g., P0457). Write these down or take a photo—they’ll help you understand what’s causing the engine light.
Step 5: Research the Code
Use the scanner’s built-in code definitions or search online for the meaning of the code. For example, P0457 typically indicates a leak in the evaporative emissions system, often due to a loose or damaged gas cap.
Step 6: Fix the Underlying Issue
Before resetting the light, address the problem. If it’s a loose gas cap, tighten it or replace it. If it’s a misfire, check spark plugs or ignition coils. For more complex issues like a failing oxygen sensor, you may need professional help.
Step 7: Clear the Codes
Once the issue is resolved, use the scanner to clear the trouble codes. Most scanners have a “Clear Codes” or “Erase DTCs” option. Select it, and the engine light should turn off.
Step 8: Verify the Reset
Turn the ignition off, wait 10 seconds, then turn it back on. The Check Engine Light should remain off. If it comes back on, the problem may not be fully resolved.
Tips for Using an OBD2 Scanner
– Choose a scanner compatible with Dodge vehicles. Popular brands include BlueDriver, Innova, and Autel.
– Some scanners offer live data and freeze frame information, which can help diagnose intermittent issues.
– Keep the scanner’s software updated for accurate code readings.
Method 2: Disconnect the Battery (Alternative Method)
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, clearing stored codes and turning off the light. However, it’s not recommended as a first choice because it also resets other systems.
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: Locate the Battery
In the 2016 Dodge Dart, the battery is in the engine compartment on the driver’s side. It’s housed in a black plastic case with a red positive (+) terminal and a black negative (-) terminal.
Step 3: Disconnect the Negative Terminal
Use a 10mm wrench or socket to loosen the nut on the negative terminal. Carefully remove the cable and tuck it away from the battery to prevent accidental contact.
Step 4: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes. This allows the ECU to fully discharge and reset. For a more thorough reset, wait up to 30 minutes.
Step 5: Reconnect the Battery
Reattach the negative cable and tighten the nut securely. Make sure the connection is firm to avoid electrical issues.
Step 6: Turn On the Ignition
Turn the key to the “ON” position (do not start the engine). The Check Engine Light should be off. If it remains on, the issue may still exist.
Step 7: Drive the Car
Start the engine and drive the car for 10–15 minutes. This allows the ECU to relearn driving patterns and complete its self-tests. If the light returns, the problem persists.
Drawbacks of Battery Disconnection
– Resets radio presets, clock, and seat memory.
– Clears adaptive transmission learning, which may cause shifting issues temporarily.
– Does not diagnose the root cause—only masks the symptom.
Method 3: Drive Cycle Reset (Natural Method)
Sometimes, the engine light will turn off on its own after the problem is fixed and the car completes a “drive cycle.” A drive cycle is a series of driving conditions that allow the ECU to run its self-tests and confirm that emissions systems are working properly.
What Is a Drive Cycle?
A typical drive cycle for the 2016 Dodge Dart includes:
– Cold start (engine off for at least 8 hours)
– 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
How Long Does It Take?
Depending on driving conditions, it may take 3–7 days of normal driving for the ECU to complete all tests and turn off the light. This method is passive but effective if the issue was minor and already resolved.
Common Causes of Engine Light in 2016 Dodge Dart
Understanding why the light came on can help you prevent it from returning. Here are the most common causes:
1. Loose or Damaged Gas Cap
The gas cap seals the fuel system. If it’s loose, cracked, or missing, fuel vapors can escape, triggering the engine light. This is the easiest fix—just tighten or replace the cap.
2. Faulty Oxygen (O2) Sensor
The O2 sensor monitors exhaust gases and helps regulate fuel mixture. A failing sensor can reduce fuel efficiency and increase emissions. Replacement costs $100–$300.
3. Spark Plug or Ignition Coil Issues
Worn spark plugs or faulty ignition coils can cause misfires, leading to poor performance and the engine light. Regular maintenance every 30,000–100,000 miles can prevent this.
4. Catalytic Converter Problems
A clogged or failing catalytic converter reduces engine efficiency and increases emissions. This is a serious issue that requires professional diagnosis and repair.
5. Mass Airflow (MAF) Sensor Failure
The MAF sensor measures incoming air to calculate fuel delivery. Dirt or damage can cause incorrect readings, triggering the light. Cleaning or replacing the sensor usually fixes it.
6. Evaporative Emissions System Leak
This system prevents fuel vapors from escaping into the atmosphere. Leaks can occur in hoses, valves, or the charcoal canister. A smoke test can help locate the leak.
Troubleshooting Tips
If the engine light returns after resetting, here’s how to troubleshoot:
Check for Recurring Codes
Use your OBD2 scanner to read the codes again. If the same code appears, the issue wasn’t fully resolved.
Inspect Recent Repairs
Did you recently replace a part? Ensure it was installed correctly and is compatible with your Dart.
Monitor Driving Conditions
Some issues only appear under specific conditions, like cold starts or highway driving. Keep a log of when the light comes on.
Visit a Mechanic
If you can’t identify or fix the problem, take your car to a trusted mechanic. They have advanced tools and expertise to diagnose complex issues.
Preventing Future Engine Light Activations
An ounce of prevention is worth a pound of cure. Follow these tips to keep your 2016 Dodge Dart running smoothly:
– Check the gas cap every time you fill up. Make sure it clicks when tightened.
– Follow the maintenance schedule in your owner’s manual. Replace spark plugs, air filters, and fluids on time.
– Use quality fuel to reduce carbon buildup and sensor contamination.
– Avoid short trips when possible. Frequent short drives prevent the engine from reaching optimal temperature, which can affect emissions.
– Listen for unusual sounds or notice changes in performance. Early detection prevents bigger problems.
Conclusion
Resetting the engine light on your 2016 Dodge Dart is a manageable task—if you approach it the right way. While it’s tempting to just disconnect the battery and hope for the best, the safest and most effective method is using an OBD2 scanner to diagnose and clear the issue. Always address the root cause before resetting the light, and monitor your car afterward to ensure the problem doesn’t return.
Remember, the Check Engine Light is there to protect your vehicle and the environment. Ignoring it can lead to costly repairs and reduced performance. By following the steps in this guide, you’ll not only reset the light but also gain valuable insight into your car’s health.
Whether you’re tightening a gas cap, replacing a sensor, or simply staying on top of maintenance, taking care of your 2016 Dodge Dart will keep it running reliably for years to come. And the next time that engine light flickers on, you’ll know exactly what to do.