Resetting the check engine light on a 2018 Dodge Journey is quick and simple using an OBD2 scanner—just plug it into the port under the dashboard, read the error code, and clear it with a button press. Always diagnose the root cause first, as the light may indicate serious issues that require repair before resetting. For a manual reset without tools, disconnect the battery for 15 minutes, though this may erase radio settings and is not recommended unless necessary.

How to 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey

Key Takeaways

• Diagnose first: Always scan for error codes before resetting the light.
• Use an OBD2 scanner: Essential for safe, accurate resets and code reading.
• Disconnect battery: A temporary fix but may erase ECU memory.
• Drive cycle matters: Complete a full drive cycle post-reset for verification.
• Check gas cap: A loose cap is a common cause—tighten or replace it.
• Reset with caution: Only clear codes after fixing the root issue.
• Monitor afterward: Watch for light return to confirm the fix worked.

Why This Matters / Understanding the Problem

You’re driving your 2018 Dodge Journey when suddenly, the check engine light (CEL) pops on. Your heart skips—what now? Is it urgent? Can you ignore it? While the light isn’t always a sign of a major breakdown, it *is* your car’s way of saying, “Hey, something’s off.” Ignoring it could lead to costly repairs down the road.

The 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey isn’t just about turning off a warning light. It’s about understanding why it came on, fixing the issue, and then—only then—safely resetting it. Think of the CEL like a smoke alarm: you don’t just remove the batteries when it beeps; you find the fire first. This guide helps you do exactly that—safely, efficiently, and without unnecessary trips to the mechanic.

Whether you’re a DIY enthusiast or just want to save a few bucks, knowing how to reset the check engine light on your 2018 Dodge Journey gives you control. But remember: resetting the light without diagnosing the problem is like putting a band-aid on a broken leg. We’ll walk you through the right way—using modern tools and smart practices.

Quick Note: The 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey emphasizes diagnosis before resetting. This ensures you’re not just masking a problem but solving it for good.

What You Need

Before you dive in, gather the right tools. The good news? You don’t need a full garage or a mechanic’s degree. Here’s what you’ll need for the 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey:

• OBD2 (On-Board Diagnostics) Scanner: This is the MVP. A basic $20–$50 scanner from Amazon or AutoZone will work. Look for one with Bluetooth if you prefer using a phone app (like Torque or FIXD).
• Smartphone or Tablet (optional): If using a Bluetooth scanner, you’ll need a device to run the app.
• Owner’s Manual: For locating the OBD2 port and understanding your Journey’s systems.
• Pen and Paper or Notes App: To record error codes (DTCs) before clearing them.
• Flashlight (optional): The OBD2 port can be hard to see in low light.
• Patience and Time: Allow 15–30 minutes for diagnosis and reset.

Pro tip: Avoid “free” reset methods like disconnecting the battery. These can cause electrical issues, erase ECU memory, and may not work on modern vehicles like the 2018 Dodge Journey. The OBD2 scanner is the safest, most reliable method.

Step-by-Step Guide to 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey

Step 1: Park Safely and Turn Off the Engine

First, pull over to a safe spot—your driveway, garage, or parking lot. Make sure the car is completely off, with the key out of the ignition. Never work on a running engine or hot components.

Why this matters: The OBD2 system needs a stable power state to communicate properly. Starting the reset while the engine is hot or running can lead to incorrect readings or failed resets.

For the 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey, safety comes first. Let the engine cool for at least 10 minutes if you’ve been driving.

Step 2: Locate the OBD2 Port

On the 2018 Dodge Journey, the OBD2 port is located under the dashboard, near the driver’s left knee. It’s a 16-pin connector, usually covered by a small plastic door or flap. Use your flashlight if needed.

Open the door and inspect the port. It should be clean and free of dust or debris. If it’s dirty, gently wipe it with a dry cloth. Avoid using liquids or compressed air—moisture can damage the connection.

This port is your gateway to your car’s brain. Every modern vehicle made after 1996 has one, and it’s essential for the 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey.

Step 3: Plug in the OBD2 Scanner

Take your OBD2 scanner and firmly plug it into the port. Push it in until it clicks or sits snugly. If using a Bluetooth scanner, make sure your phone’s Bluetooth is on and paired with the device.

Now, turn the ignition to the “ON” position—but do not start the engine. You should see lights on the scanner or your phone app. This tells you the scanner is powered and communicating with the car’s ECU (Engine Control Unit).

Wait 10–15 seconds for the connection to stabilize. Some scanners beep or flash when ready. If nothing happens, double-check the connection and try again.

Step 4: Read the Diagnostic Trouble Codes (DTCs)

This is the most important step. Don’t skip it. Use the scanner to read the error codes. These are alphanumeric codes like P0171, P0300, or P0420. Each code tells you what’s wrong.

For example:

• P0171: System too lean (Bank 1) — often due to a vacuum leak or dirty MAF sensor.
• P0300: Random/multiple cylinder misfire — could be spark plugs, coils, or fuel delivery.
• P0420: Catalyst efficiency below threshold — often a failing catalytic converter.

Write down every code. Even if there are multiple, record them all. This helps you prioritize fixes. The 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey stresses diagnosis—because clearing codes without understanding them is risky.

Use your scanner’s “Read Codes” or “Live Data” function. Many apps will give you a plain-English explanation of what each code means.

Step 5: Research and Fix the Underlying Issue

Now that you have the code(s), it’s time to fix the problem. This step varies depending on the code, but here are common fixes for the 2018 Dodge Journey:

• Vacuum Leak (P0171/P0174): Inspect hoses under the hood. Listen for hissing sounds. Replace cracked or loose hoses. Check the PCV valve.
• Misfire (P0300–P0306): Replace spark plugs and ignition coils. Use OEM or high-quality aftermarket parts. Misfires can damage the catalytic converter.
• O2 Sensor (P0135, P0141): Replace the faulty oxygen sensor. The 2018 Journey has multiple O2 sensors—locate the correct one using a repair manual.
• EVAP System (P0455, P0457): Check the gas cap. Tighten it or replace it if cracked. Inspect EVAP hoses and the purge valve.
• Throttle Body Issues (P0123, P0222): Clean the throttle body with throttle cleaner. Avoid touching the electronic parts.

Don’t rush this step. For example, if the code says “lean condition,” but you just clear it without fixing the leak, the light will come back—possibly with more damage. The 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey is about long-term reliability, not quick fixes.

Pro tip: Use forums like DodgeForum.com or JourneyOwners.com to see if others have had the same issue. Real-world fixes are gold.

Step 6: Clear the Codes

Once you’ve fixed the problem (or at least made a repair attempt), it’s time to clear the codes. On your scanner, find the “Clear Codes” or “Erase DTCs” option. Confirm the action.

You’ll see a message like “Codes Cleared” or “System Reset.” The check engine light should turn off immediately. If it doesn’t, don’t panic—some systems take a few drive cycles to reset.

Important: After clearing, don’t start the engine yet. Wait 10 seconds, then unplug the scanner. This ensures the ECU properly logs the reset.

Warning: Clearing codes without fixing the issue will only delay the inevitable. The light will return, and the problem may worsen. Always fix first, reset second.

Step 7: Start the Engine and Monitor

Now, start your 2018 Dodge Journey. Let it idle for 30 seconds. Watch the dashboard. If the check engine light stays off, great! But don’t stop here.

Drive the car for 10–15 minutes, including highway speeds if possible. This helps the ECU run its “readiness monitors”—self-tests that verify the repair. Some monitors take multiple drive cycles (start, drive, stop) to complete.

Use your scanner again after driving to check if any new codes appear. If the light comes back, repeat the diagnosis process. The 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey isn’t a one-and-done—it’s a cycle of check, fix, reset, verify.

Step 8: Perform a Drive Cycle (If Needed)

If the light is off but you’re going to smog check or want to be 100% sure, you may need a full “drive cycle.” This is a specific sequence of driving conditions the ECU uses to test systems.

For the 2018 Dodge Journey, a typical drive cycle includes:

• Start cold (engine below 120°F)
• Idle for 2–3 minutes
• Accelerate to 55 mph, hold for 2 minutes
• Slow to 20 mph, coast for 1 minute
• Accelerate to 55 mph again, hold for 5 minutes
• Stop, idle for 2 minutes
• Turn off engine, wait 10 minutes

After this, plug in your scanner and check “Readiness Monitors.” All should show “Complete” or “Ready.” This ensures your reset is permanent and emissions-compliant.

Pro Tips & Common Mistakes to Avoid

Pro Tip #1: Use a scanner with freeze frame data. This shows conditions when the code triggered (e.g., speed, RPM, coolant temp). It helps pinpoint intermittent issues.

Pro Tip #2: Keep a log of codes and repairs. Use a notebook or app. This helps track patterns and saves time on future issues.

Pro Tip #3: If the light flashes, stop driving immediately. A flashing CEL means a severe misfire that can destroy the catalytic converter. Get it towed if needed.

Common Mistake #1: Clearing codes without diagnosis. This is the #1 error. People think, “I’ll reset it and see if it comes back.” But if the problem is a failing O2 sensor or clogged fuel injector, you’re just delaying the repair—and risking damage.

Common Mistake #2: Using a cheap or broken scanner. Not all OBD2 scanners are equal. Some can’t read manufacturer-specific codes or freeze frame data. Invest in a mid-range scanner (like Innova 3100 or BlueDriver) for better results.

Common Mistake #3: Ignoring readiness monitors. If you reset for a smog check, but monitors aren’t ready, you’ll fail. Always verify readiness after a reset, especially in states with strict emissions laws.

Common Mistake #4: Disconnecting the battery to reset. This can reset the ECU, but it also erases learned settings (like throttle position, fuel trims). It may cause rough idle, poor performance, or even trigger new codes. Use the OBD2 method instead.

Common Mistake #5: Assuming one fix solves everything. Some issues, like a P0420 (catalyst efficiency), may need multiple repairs. A bad O2 sensor can *cause* a P0420, but so can a misfire or fuel trim issue. Always look at the big picture.

The 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey works best when you treat it like a detective story: find the clues, solve the case, then close the file.

FAQs About 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey

Q: Can I reset the check engine light without a scanner?
A: Technically, yes—but it’s not recommended. Methods like disconnecting the battery or cycling the ignition key may turn off the light, but they don’t diagnose the problem. Worse, they can erase ECU data and cause drivability issues. The 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey strongly advises using an OBD2 scanner for safety and accuracy.

Q: How much does an OBD2 scanner cost?
A: Basic models start at $20 (like Ancel AD310). Mid-range scanners with Bluetooth and app support cost $50–$100 (BlueDriver, FIXD). High-end models with advanced diagnostics go up to $200. For most DIYers, a $50–$70 scanner is ideal.

Q: Will the light come back after resetting?
A: It might—if you didn’t fix the root cause. For example, if a vacuum hose is still leaking, the ECU will detect the lean condition again and trigger the light. The 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey emphasizes fixing the issue first, not just hiding it.

Q: Can I pass a smog check with a reset light?
A: Only if all readiness monitors are complete. After resetting, drive through a full drive cycle. Use your scanner to check monitor status. If any are “Not Ready,” the car will fail in most states.

Q: What if I get multiple codes?
A: Address the most critical first. Misfires (P0300+) and oxygen sensor codes (P0130–P0167) are usually top priority. Use your scanner’s severity rating or research online. Fix one at a time, then retest.

Q: Is it safe to drive with the check engine light on?
A: If it’s steady, you can drive short distances to get home or to a shop. But if it’s flashing, pull over immediately. A flashing CEL means severe misfire—driving further can destroy the catalytic converter.

Q: Can I reset the light at an auto parts store?
A: Yes! Many stores like AutoZone, O’Reilly, and Advance Auto Parts offer free code reading and resetting. They’ll plug in their scanner, read codes, and clear them at no cost. Just don’t forget to fix the problem afterward!

Final Thoughts

Resetting the check engine light on your 2018 Dodge Journey doesn’t have to be scary. With the right tools and a methodical approach, you can diagnose, fix, and reset—saving time, money, and stress. The 2026 Guide How to Reset Check Engine Light on 2018 Dodge Journey is your roadmap to smarter car care.

Remember: the light is a warning, not a curse. Treat it like a helpful friend saying, “Hey, check this out.” Use an OBD2 scanner, read the codes, fix the problem, and then—and only then—reset the light.

Keep your scanner in the glovebox. Log your repairs. Drive smart. And if you ever hit a wall, don’t hesitate to consult a mechanic. Sometimes, the best DIY move is knowing when to ask for help.

Now go out there, take control of your Journey, and drive with confidence. The road ahead is clearer when you know exactly what’s going on under the hood.

Stay safe, stay informed, and happy driving!