Resetting the engine light on a 2015 Chrysler 200 doesn’t always require a mechanic. This guide walks you through simple methods, from using an OBD2 scanner to manual battery disconnection, ensuring you fix the issue and clear the warning light safely.
Key Takeaways
- Understand the cause first: Never reset the engine light without diagnosing the underlying issue. Ignoring problems can lead to costly repairs.
- Use an OBD2 scanner for accuracy: This tool reads error codes and safely clears the light after repairs are made.
- Manual reset via battery disconnection works: Disconnecting the negative battery terminal for 15–30 minutes can reset the system, but may also reset radio and clock settings.
- Drive cycle may be required: After a reset, your car may need to complete a drive cycle for the computer to relearn driving patterns.
- Check gas cap regularly: A loose or faulty gas cap is a common cause of the engine light—tighten or replace it before resetting.
- Avoid cheap code readers: Invest in a reliable OBD2 scanner for accurate diagnostics and long-term use.
- Consult a professional if unsure: If the light returns or you’re uncomfortable with DIY fixes, seek help from a certified mechanic.
How to Reset Engine Light on 2015 Chrysler 200
The check engine light on your 2015 Chrysler 200 can be alarming, but it doesn’t always mean a major problem. It could be something as simple as a loose gas cap or a minor sensor issue. However, before you reset the engine light, it’s crucial to understand why it came on in the first place. Resetting the light without fixing the root cause is like turning off a smoke alarm while the fire still burns—it hides the problem, not solves it.
In this comprehensive guide, you’ll learn how to safely and effectively reset the engine light on your 2015 Chrysler 200. We’ll cover multiple methods, including using an OBD2 scanner, disconnecting the battery, and even some built-in vehicle procedures. You’ll also find troubleshooting tips, safety precautions, and answers to common questions. By the end, you’ll feel confident handling this common automotive issue—whether you’re a DIY enthusiast or just want to save a trip to the mechanic.
Why the Engine Light Comes On
Before diving into the reset process, it’s important to understand what triggers the check engine light. The engine control unit (ECU) in your 2015 Chrysler 200 monitors various sensors and systems. When it detects a problem—such as a misfire, emissions issue, or faulty sensor—it turns on the engine light and stores a diagnostic trouble code (DTC).
Visual guide about How to Reset Engine Light on 2015 Chrysler 200
Image source: cararac.com
Common causes include:
- A loose, damaged, or missing gas cap
- Faulty oxygen (O2) sensor
- Misfiring spark plugs or ignition coils
- Mass airflow (MAF) sensor issues
- Catalytic converter problems
- Evaporative emissions system leaks
Some of these issues are minor and inexpensive to fix, while others may require professional attention. That’s why diagnosing the problem is the first and most important step.
Tools You’ll Need
Depending on the method you choose, you may need one or more of the following tools:
- OBD2 scanner: A handheld device that plugs into your car’s diagnostic port to read and clear error codes.
- Wrench or socket set: For disconnecting the battery (usually a 10mm socket).
- Safety gloves and glasses: To protect yourself when working under the hood.
- Owner’s manual: For reference on fuse locations, battery terminals, and vehicle-specific procedures.
Most modern OBD2 scanners are affordable and easy to use. You can find reliable models for under $50 at auto parts stores or online. Look for one with a clear display, code definitions, and the ability to clear codes.
Method 1: Using an OBD2 Scanner (Recommended)
The most accurate and safest way to reset the engine light is by using an OBD2 scanner. This method allows you to read the specific error code, understand the problem, and clear the light only after the issue has been resolved.
Step 1: Locate the OBD2 Port
In the 2015 Chrysler 200, the OBD2 port is typically located under the dashboard on the driver’s side. You’ll find it near the steering column, just above the brake pedal. It’s a 16-pin connector, usually black or gray, and may be covered by a small plastic flap.
Step 2: Turn Off the Engine
Make sure the engine is completely off before plugging in the scanner. This prevents electrical interference and ensures accurate readings.
Step 3: Plug in the OBD2 Scanner
Insert the scanner’s connector into the OBD2 port. Push it in firmly until it clicks into place. Most scanners will power on automatically when connected.
Step 4: Turn the Ignition to “On”
Turn the key to the “ON” position (but don’t start the engine). This powers up the vehicle’s electrical system and allows the scanner to communicate with the ECU.
Step 5: Read the Error Code
Follow the scanner’s on-screen prompts to retrieve the diagnostic trouble code (DTC). The code will appear as a combination of letters and numbers, such as P0455 (large evaporative emissions leak) or P0302 (cylinder 2 misfire).
Write down the code or take a photo for reference. Many scanners also provide a brief description of the issue, which can help you understand what needs fixing.
Step 6: Fix the Underlying Problem
Before clearing the code, address the root cause. For example:
- If the code is P0455, check and tighten the gas cap or replace it if damaged.
- If it’s a misfire code, inspect spark plugs and ignition coils.
- If it’s an O2 sensor code, consider replacing the sensor.
Always fix the issue first. Clearing the code without repairs will likely result in the light coming back on.
Step 7: Clear the Code
Once the problem is fixed, return to the scanner and select the “Clear Codes” or “Erase DTCs” option. Confirm the action when prompted. The scanner will send a command to the ECU to reset the engine light.
Step 8: Verify the Reset
After clearing the code, turn the ignition off and then back on. The engine light should remain off. If it comes back on, the problem may not be fully resolved, or a new issue has occurred.
Step 9: Complete a Drive Cycle
Some systems require a “drive cycle” to confirm the repair. This means driving under various conditions (city, highway, cold start, etc.) so the ECU can relearn and verify that the issue is fixed. Your scanner may indicate when monitors are ready.
Using an OBD2 scanner is the best method because it gives you full control and insight into your vehicle’s health. It’s also reusable for future diagnostics.
Method 2: Disconnecting the Battery
If you don’t have an OBD2 scanner, you can reset the engine light by disconnecting the car battery. This method forces the ECU to reset by cutting power, but it’s less precise and may not work for all issues.
Step 1: Turn Off the Engine and Remove the Key
Make sure the car is off and the key is out of the ignition. This prevents electrical surges or damage.
Step 2: Locate the Battery
In the 2015 Chrysler 200, the battery is located in the engine compartment on the driver’s side. Open the hood and secure it with the prop rod.
Step 3: Identify the Negative Terminal
The battery has two terminals: positive (red, marked with a “+”) and negative (black, marked with a “-”). Always disconnect the negative terminal first to avoid short circuits.
Step 4: Loosen the Negative Cable
Use a 10mm wrench or socket to loosen the nut on the negative terminal. Once loose, carefully wiggle the cable clamp and remove it from the battery post. Tuck it away from the terminal so it doesn’t accidentally touch.
Step 5: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes. This allows the ECU’s capacitors to drain and the system to fully reset. For a more thorough reset, wait up to 30 minutes.
Step 6: Reconnect the Battery
After waiting, reattach the negative cable to the battery post. Tighten the nut securely with your wrench. Make sure the connection is snug to ensure proper electrical contact.
Step 7: Turn on the Ignition
Turn the key to the “ON” position (without starting the engine). The engine light may flash briefly, then turn off. If it stays off, the reset was successful.
Step 8: Start the Engine
Start the car and let it idle for a few minutes. The engine light should remain off. If it comes back on, the underlying issue may still exist.
Note: Disconnecting the battery may reset other systems, such as the radio presets, clock, and power window settings. You may need to reprogram these manually.
Method 3: Using the Gas Cap Trick
Sometimes, the engine light comes on simply because the gas cap is loose or damaged. This is one of the most common and easiest fixes.
Step 1: Turn Off the Engine
Make sure the car is off before checking the gas cap.
Step 2: Locate the Gas Cap
The gas cap is on the rear driver’s side of the vehicle. Twist it counterclockwise to remove.
Step 3: Inspect the Cap
Check for cracks, worn seals, or damage. A damaged cap can’t maintain proper pressure in the fuel system, triggering the engine light.
Step 4: Tighten the Cap
Replace the cap and twist it clockwise until it clicks 3–5 times. This ensures it’s sealed properly.
Step 5: Drive the Car
Drive normally for a few days. The ECU will monitor the evaporative emissions system. If the cap was the only issue, the light may turn off on its own after a few drive cycles.
Step 6: Use an OBD2 Scanner to Clear
If the light doesn’t turn off, use an OBD2 scanner to clear the code after confirming the cap is secure.
This method is free and takes less than a minute. Always check the gas cap first—it’s a quick fix that solves many engine light issues.
Method 4: Letting the Light Turn Off Naturally
In some cases, the engine light may turn off on its own if the problem was temporary. For example, a brief misfire or minor sensor glitch might not reoccur.
The ECU continuously monitors systems and will turn off the light if the issue doesn’t happen again over several drive cycles. This usually takes 3–7 days of normal driving.
However, don’t rely on this method if the light is flashing or if you notice performance issues like rough idling, poor fuel economy, or hesitation. A flashing light indicates a serious problem that needs immediate attention.
Troubleshooting Common Issues
Even after resetting the engine light, you may encounter problems. Here’s how to troubleshoot:
Engine Light Comes Back On
If the light returns after a reset, the original issue wasn’t fully resolved. Use an OBD2 scanner to read the new code. It may be the same code or a different one. Recheck components like the gas cap, spark plugs, or sensors.
Radio or Clock Resets After Battery Disconnection
This is normal. Reconnect the battery and reprogram your radio presets and clock. Some vehicles may require a security code to restore radio functionality—check your owner’s manual.
OBD2 Scanner Won’t Connect
Ensure the ignition is in the “ON” position. Check that the scanner is compatible with your vehicle. Try a different scanner or consult the manufacturer’s support.
Engine Light Flashes While Driving
A flashing light indicates a severe misfire that can damage the catalytic converter. Pull over safely, turn off the engine, and call a tow truck. Do not continue driving.
No Improvement After Reset
If the light stays on or performance doesn’t improve, visit a mechanic. There may be a deeper issue like a failing catalytic converter or internal engine problem.
Safety Tips and Best Practices
- Always wear safety gloves and glasses when working under the hood.
- Never disconnect the battery while the engine is running.
- Use the correct tools to avoid stripping bolts or damaging components.
- Keep a record of error codes and repairs for future reference.
- Don’t ignore a persistent or flashing engine light—seek professional help.
When to See a Mechanic
While many engine light issues can be resolved at home, some require professional diagnosis and repair. See a mechanic if:
- The light is flashing.
- You notice poor performance, stalling, or unusual noises.
- The same code keeps returning after repairs.
- You’re uncomfortable performing DIY diagnostics.
A certified technician has advanced tools and expertise to pinpoint complex issues and ensure your 2015 Chrysler 200 runs safely and efficiently.
Conclusion
Resetting the engine light on your 2015 Chrysler 200 is a manageable task with the right approach. Start by diagnosing the issue—don’t just clear the light and hope for the best. Use an OBD2 scanner for accuracy, or try the battery disconnection method if you’re in a pinch. Always address the root cause, whether it’s a loose gas cap, faulty sensor, or ignition problem.
Remember, the engine light is your car’s way of saying, “Hey, something’s not right.” Respecting that warning and taking action can save you time, money, and prevent bigger problems down the road. With this guide, you’re equipped to handle the reset confidently and keep your Chrysler 200 running smoothly.