Discover step-by-step methods to reset the check engine light in your 2017 Dodge Charger, including using an OBD2 scanner, disconnecting the battery, and driving cycles. Always diagnose the root cause first to avoid recurring issues.
Key Takeaways
- Diagnose the problem first: Never reset the check engine light without identifying and fixing the underlying issue, such as a loose gas cap or faulty oxygen sensor.
- Use an OBD2 scanner for accuracy: This is the safest and most reliable method to clear codes and reset the light in your 2017 Dodge Charger.
- Battery disconnect works but has drawbacks: Disconnecting the battery can reset the light, but it may also erase radio settings, trip computer data, and require a drive cycle to complete.
- Drive cycles may auto-reset the light: After repairs, driving under normal conditions for 50–100 miles can allow the vehicle’s computer to recheck systems and turn off the light.
- Avoid quick-fix myths: Spraying carb cleaner or tapping sensors won’t fix real problems and can damage your engine or void warranties.
- Check gas cap regularly: A loose or damaged gas cap is one of the most common causes of a check engine light in the 2017 Charger.
- Monitor after reset: If the light returns, it means the issue persists—seek professional diagnosis to prevent long-term damage.
How to Reset Check Engine Light in 2017 Dodge Charger
If you’ve recently fixed an issue in your 2017 Dodge Charger—like replacing a faulty oxygen sensor or tightening a loose gas cap—you might notice the check engine light is still on. That’s because the vehicle’s onboard computer (PCM) stores trouble codes even after the problem is resolved. Resetting the light tells the system to recheck all emissions and engine functions.
In this guide, you’ll learn multiple safe and effective ways to reset the check engine light in your 2017 Dodge Charger. We’ll cover using an OBD2 scanner, disconnecting the battery, and allowing the vehicle to reset itself through normal driving. We’ll also explain why simply clearing the light without fixing the root cause is a bad idea—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 walk you through each method with clear, easy-to-follow steps. Let’s get started.
Understanding the Check Engine Light
Visual guide about How to Reset Check Engine Light in 2017 Dodge Charger
Image source: i.ytimg.com
Before resetting the light, it’s important to understand what it means. The check engine light (also called the malfunction indicator lamp or MIL) is part of your Charger’s onboard diagnostics system (OBD2). When the PCM detects a problem with the engine, emissions, or transmission, it triggers the light and stores a diagnostic trouble code (DTC).
These codes range from minor issues—like a loose gas cap—to serious problems such as a failing catalytic converter or misfiring engine. Ignoring the light can lead to reduced fuel efficiency, increased emissions, and even engine damage over time.
The 2017 Dodge Charger uses a sophisticated OBD2 system that monitors over 200 parameters. That’s why resetting the light without diagnosing the issue is like turning off a smoke alarm while the fire still burns. Always address the root cause first.
Method 1: Use an OBD2 Scanner (Recommended)
The most reliable and accurate way to reset the check engine light is by using an OBD2 scanner. This tool connects to your vehicle’s diagnostic port and communicates directly with the PCM. It can read trouble codes, explain what they mean, and clear them safely.
What You’ll Need
- OBD2 scanner (basic models start around $20; Bluetooth scanners work with smartphone apps)
- Your 2017 Dodge Charger
- Ignition key
Step-by-Step Instructions
Step 1: Locate the OBD2 Port
In the 2017 Dodge Charger, the OBD2 port is located under the dashboard on the driver’s side, just below the steering column. It’s a 16-pin connector, usually black or gray, and easy to spot once you look for it. You don’t need tools to access it—just bend down and look up from the footwell.
Step 2: Plug in the Scanner
Turn off the ignition, then plug the OBD2 scanner into the port. Make sure it’s fully inserted. Some scanners power on automatically; others require you to press a button.
Step 3: Turn the Ignition to “On”
Turn the key to the “ON” position (but don’t start the engine). This powers up the vehicle’s electronics and allows the scanner to communicate with the PCM. The scanner screen should light up and display a menu.
Step 4: Read the Trouble Codes
Use the scanner to read the stored trouble codes. Most scanners have a “Read Codes” or “Scan” button. The device will display one or more codes, such as P0455 (large EVAP leak) or P0171 (system too lean).
Write down the codes or take a photo. You can use free online databases or apps like “OBD2 Code Lookup” to understand what each code means. For example, P0420 often indicates a failing catalytic converter, while P0128 points to a thermostat issue.
Step 5: Clear the Codes
Once you’ve confirmed the issue has been fixed (e.g., you replaced the oxygen sensor or tightened the gas cap), select the “Clear Codes” or “Erase Codes” option on the scanner. The device will send a command to the PCM to delete the stored trouble codes.
After clearing, the check engine light should turn off immediately. If it doesn’t, double-check that the scanner is properly connected and that the ignition is on.
Step 6: Verify the Reset
Start the engine and let it idle for a few minutes. If the light stays off, the reset was successful. Take the car for a short drive to ensure everything runs smoothly.
Tips for Using an OBD2 Scanner
- Choose a scanner with live data and code definitions—basic models only clear codes but don’t explain them.
- Bluetooth scanners like the BlueDriver or FIXD work with iOS and Android apps and offer detailed diagnostics.
- Always clear codes after repairs—don’t assume the light will turn off on its own.
- If the light comes back on, the problem wasn’t fully resolved. Recheck the codes and consult a mechanic if needed.
Method 2: Disconnect the Battery
If you don’t have an OBD2 scanner, disconnecting the battery is a common alternative. This method cuts power to the PCM, forcing it to reset. However, it’s not as precise as using a scanner and comes with some drawbacks.
What You’ll Need
- Wrench or socket set (usually 10mm for the battery terminal)
- Safety gloves and glasses
- Your 2017 Dodge Charger
Step-by-Step Instructions
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 accidental starts.
Step 2: Locate the Battery
The battery in the 2017 Dodge Charger is under the hood, on the driver’s side. It’s a standard 12-volt lead-acid battery with positive (+) and negative (-) terminals.
Step 3: Disconnect the Negative Terminal First
Use a wrench to loosen the nut on the negative (black) terminal. Always disconnect the negative first to avoid short circuits. Once loose, carefully remove the cable and tuck it away from the battery.
Step 4: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes. This allows the PCM and other modules to fully discharge and reset. Some experts recommend up to 30 minutes for a complete reset.
Step 5: Reconnect the Battery
Reattach the negative cable and tighten the nut securely. Then reconnect the positive (red) terminal. Make sure both connections are tight to prevent voltage drops.
Step 6: Start the Engine
Turn the key to start the engine. The check engine light may flash briefly, then turn off. If it stays off, the reset was successful.
Drawbacks of Battery Disconnect
- Erases memory settings: Radio presets, clock, trip computer, and seat positions may reset.
- May trigger other warnings: Some systems (like TPMS or ABS) may need recalibration.
- Doesn’t clear all codes: Some trouble codes are stored in non-volatile memory and won’t be erased.
- Requires drive cycle: The PCM may need to complete a drive cycle to recheck systems and confirm the issue is fixed.
Tips for Battery Disconnect Method
- Use a memory saver device (plugs into the OBD2 port or cigarette lighter) to preserve radio and computer settings.
- After reconnecting, drive the car for 20–30 minutes under varied conditions (city and highway) to allow the PCM to relearn fuel trims and complete monitors.
- If the light returns, the problem wasn’t fixed—don’t repeat this method without diagnosis.
Method 3: Drive Cycle Reset (Automatic)
In some cases, the check engine light will turn off on its own after the issue is fixed—no tools required. This happens when the PCM completes a “drive cycle,” a series of driving conditions that allow it to test emissions and engine systems.
What Is a Drive Cycle?
A drive cycle is a specific pattern of driving that includes cold starts, idling, acceleration, cruising, and deceleration. The PCM uses this cycle to verify that repairs were successful and that all systems are functioning within normal parameters.
For the 2017 Dodge Charger, a typical drive cycle includes:
- Cold start (engine off for at least 8 hours)
- Idle for 2–3 minutes
- Accelerate to 55 mph and cruise for 5–10 minutes
- Decelerate without braking (let the car slow naturally)
- Repeat acceleration and deceleration 2–3 times
- Return to idle for 2 minutes
How Long Does It Take?
Most drive cycles take 30–60 minutes of driving. After completing the cycle, the PCM will recheck all monitored systems. If no faults are detected, the check engine light will turn off.
When This Method Works
- After fixing minor issues like a loose gas cap
- After replacing a sensor that doesn’t require immediate code clearing
- When you don’t have access to an OBD2 scanner
Limitations
- Not all codes will clear automatically—some require manual reset
- If the light was on for a serious issue (like a misfire), it may not turn off without clearing
- You must complete the full drive cycle; stopping early may prevent the reset
Troubleshooting Common Issues
Even after resetting the light, you may encounter problems. Here’s how to handle common scenarios.
The Light Comes Back On
If the check engine light returns after a reset, the underlying issue wasn’t fully resolved. Common causes include:
- Faulty oxygen sensor
- Bad spark plugs or ignition coils
- EVAP system leak (often a cracked hose or faulty purge valve)
- Catalytic converter failure
Use an OBD2 scanner to read the new codes and address the root cause.
The Light Flashes While Driving
A flashing check engine light indicates a severe misfire that can damage the catalytic converter. Pull over safely, turn off the engine, and have the car towed to a repair shop.
Radio or Clock Reset After Battery Disconnect
This is normal. Use your owner’s manual to reset the clock and reprogram radio stations. Some Chargers require a security code for the radio—check your glove box or manual for the code card.
Check Engine Light Won’t Turn Off
If the light remains on after multiple resets, there may be an intermittent fault or a problem with the PCM itself. Visit a certified Dodge technician for advanced diagnostics.
Safety and Best Practices
Resetting the check engine light is generally safe, but follow these guidelines to avoid damage:
- Always diagnose the problem first—don’t reset the light as a quick fix
- Use quality tools and avoid cheap, unreliable scanners
- Wear safety gear when working under the hood
- Never disconnect the battery while the engine is running
- Keep a record of trouble codes and repairs for future reference
Conclusion
Resetting the check engine light in your 2017 Dodge Charger is a straightforward process, but it should never be done without understanding why the light came on in the first place. The best method is using an OBD2 scanner, which gives you accurate diagnostics and a clean reset. Disconnecting the battery works in a pinch, but it comes with trade-offs. And in some cases, a proper drive cycle will clear the light automatically after repairs.
Remember: the check engine light is your car’s way of saying, “Something needs attention.” Ignoring it or repeatedly resetting it without fixing the issue can lead to costly repairs down the road.
By following this guide, you’ll not only reset the light safely but also keep your Charger running smoothly for years to come.