This guide walks you through how to reset check engine light on Kia Soul using simple methods like driving cycles, OBD2 scanners, and battery disconnects. 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 precision: This tool reads error codes and safely clears the light while providing detailed diagnostic information.
- Driving cycles can reset the light automatically: After repairs, driving your Kia Soul under specific conditions may allow the onboard computer to clear the light on its own.
- Battery disconnect is a last resort: Disconnecting the battery can reset the light but may also erase radio settings and adaptive transmission data.
- Check gas cap regularly: A loose or damaged gas cap is one of the most common causes of a check engine light in Kia Soul models.
- Monitor after reset: Always drive your vehicle for a few days post-reset to ensure the light doesn’t return, indicating the problem is truly resolved.
- Seek professional help if unsure: If you’re unable to diagnose or fix the issue, consult a certified Kia technician to prevent further damage.
How to Reset Check Engine Light on Kia Soul
If you’ve ever been driving your Kia Soul and suddenly seen that dreaded yellow or orange engine-shaped light flicker on your dashboard, you’re not alone. The check engine light is one of the most common warning indicators in modern vehicles, and while it can be alarming, it’s often manageable with the right knowledge and tools. In this comprehensive guide, you’ll learn exactly how to reset check engine light on Kia Soul—safely, effectively, and without unnecessary trips to the mechanic.
We’ll walk you through multiple methods, from simple fixes like tightening your gas cap to using advanced OBD2 scanners. You’ll also learn why the light came on in the first place, how to interpret error codes, and what to do if the light keeps coming back. Whether you’re a DIY enthusiast or just want to save a few bucks on diagnostics, this guide has everything you need.
By the end of this article, you’ll understand not only how to reset the light but also how to prevent it from returning. Let’s get started!
Understanding the Check Engine Light
Visual guide about How to Reset Check Engine Light on Kia Soul
Image source: kiacheckenginelight.com
Before you reset the check engine light on your Kia Soul, it’s important to understand what it means. The check engine light—also known as the malfunction indicator lamp (MIL)—is part of your vehicle’s onboard diagnostics system (OBD2). When the car’s computer detects a problem with the engine, emissions system, or other critical components, it triggers this light to alert you.
The light can illuminate for a wide range of issues, from minor ones like a loose gas cap to serious problems like a failing catalytic converter. In some cases, the light may flash, which indicates a severe issue that requires immediate attention. A steady light usually means the problem is less urgent but still needs to be addressed.
Your Kia Soul’s OBD2 system monitors sensors and components such as the oxygen sensors, mass airflow sensor, ignition system, and fuel injectors. When one of these systems operates outside normal parameters, the computer stores a diagnostic trouble code (DTC) and turns on the check engine light.
It’s crucial to remember that resetting the light without fixing the underlying issue is like turning off a smoke alarm while your house is on fire. The light will likely return, and you could be risking further damage to your vehicle. That’s why diagnosis should always come before reset.
Common Causes of Check Engine Light in Kia Soul
Knowing why the check engine light came on can help you choose the right reset method and prevent future occurrences. Here are some of the most common causes in Kia Soul models:
Loose or Faulty Gas Cap
One of the simplest and most frequent causes is a loose, damaged, or missing gas cap. The gas cap seals the fuel system and maintains proper pressure. If it’s not tightened properly after refueling, or if the seal is worn out, the system detects a leak and triggers the light.
Oxygen (O2) Sensor Failure
The O2 sensor monitors the amount of unburned oxygen in the exhaust. A faulty sensor can cause poor fuel economy, increased emissions, and engine performance issues. This is a common issue in older Kia Souls, especially those with high mileage.
Mass Airflow (MAF) Sensor Problems
The MAF sensor measures the amount of air entering the engine to calculate the correct fuel mixture. Dirt, oil, or damage to this sensor can lead to rough idling, stalling, or reduced power.
Catalytic Converter Issues
The catalytic converter reduces harmful emissions. Over time, it can become clogged or damaged, especially if the engine is burning oil or running rich. This is a more serious issue that often requires replacement.
Spark Plug or Ignition Coil Failure
Worn spark plugs or faulty ignition coils can cause misfires, which trigger the check engine light. This is especially common in Kia Souls with over 80,000 miles.
Evaporative Emissions System Leak
The EVAP system captures fuel vapors and prevents them from escaping into the atmosphere. A small leak—such as a cracked hose or faulty purge valve—can trigger the light.
Thermostat or Coolant Temperature Sensor Malfunction
If the engine isn’t reaching the correct operating temperature, it can affect fuel efficiency and emissions. A stuck-open thermostat or faulty sensor may be the culprit.
Method 1: Fix the Problem and Drive (Automatic Reset)
The safest and most recommended way to reset the check engine light on your Kia Soul is to fix the underlying issue and allow the vehicle’s computer to clear the light automatically. This method relies on something called a “drive cycle.”
What Is a Drive Cycle?
A drive cycle is a specific sequence of driving conditions that allows the vehicle’s onboard computer to retest the systems that triggered the check engine light. Once the computer confirms that the problem is resolved and all systems are functioning properly, it will turn off the light.
How to Perform a Drive Cycle on a Kia Soul
While exact drive cycles can vary slightly by model year, here’s a general procedure that works for most Kia Souls:
- Start with a cold engine. Let your car sit overnight so the engine is completely cool.
- Drive at 30–40 mph for 3–5 minutes. This warms up the engine and oxygen sensors.
- Accelerate to 55 mph and maintain speed for 5–10 minutes. This allows the catalytic converter to reach operating temperature.
- Decelerate without braking (coast) for 2–3 minutes. This tests the EVAP system.
- Drive in stop-and-go traffic for 5–10 minutes. This simulates city driving and tests various sensors.
- Park and let the engine idle for 2–3 minutes. This completes the cycle.
After completing this drive cycle, turn off the car and wait 10–15 minutes. Then restart it. If the problem has been fixed, the check engine light should be off. If it remains on, the issue may not be fully resolved, or additional drive cycles may be needed.
Tips for Success
- Ensure the gas cap is tight before starting.
- Use premium fuel if recommended, as it can help clean sensors.
- Avoid short trips—longer drives are more effective for completing drive cycles.
- Check your owner’s manual for model-specific drive cycle instructions.
Method 2: Use an OBD2 Scanner (Recommended)
For the most accurate and reliable way to reset the check engine light on your Kia Soul, use an OBD2 scanner. This handheld device plugs into your car’s diagnostic port and communicates with the onboard computer to read error codes and clear the light.
Why Use an OBD2 Scanner?
An OBD2 scanner does more than just reset the light—it tells you exactly what’s wrong. This helps you avoid guesswork and ensures you’re fixing the real problem. Many affordable scanners are available for under $50, and some even connect to your smartphone via Bluetooth.
Step-by-Step Guide to Using an OBD2 Scanner
Step 1: Locate the OBD2 Port
In most Kia Soul models, the OBD2 port is located under the dashboard on the driver’s side, near the steering column. It’s a 16-pin connector that’s usually black or gray. You may need to crouch down or use a flashlight to find it.
Step 2: Plug in the Scanner
Turn off the ignition, then plug the OBD2 scanner into the port. Make sure it’s securely connected.
Step 3: Turn on the Ignition
Turn the key to the “ON” position (but don’t start the engine). This powers up the scanner and allows it to communicate with the car’s computer.
Step 4: Read the Codes
Follow the scanner’s instructions to read the diagnostic trouble codes (DTCs). Common codes for Kia Souls include:
- P0457: Evaporative emission system leak (often a loose gas cap)
- P0133: O2 sensor circuit slow response
- P0300: Random/multiple cylinder misfire
- P0420: Catalyst system efficiency below threshold
Write down the codes and research them online or in the scanner’s manual to understand the issue.
Step 5: Fix the Problem
Based on the code, take appropriate action. For example:
- If the code is P0457, tighten or replace the gas cap.
- If it’s P0133, inspect the O2 sensor and wiring.
- If it’s P0300, check spark plugs and ignition coils.
Step 6: Clear the Codes
Once the issue is fixed, use the scanner’s “Clear Codes” or “Erase DTCs” function to reset the check engine light. The scanner will confirm when the codes have been cleared.
Step 7: Test Drive
Drive your Kia Soul for a few days to ensure the light doesn’t return. If it does, the problem may not be fully resolved.
Recommended OBD2 Scanners for Kia Soul
- BlueDriver Bluetooth Pro: Works with iOS and Android, provides detailed reports.
- Autel MaxiCOM MK808: Professional-grade scanner with advanced diagnostics.
- Innova 3160g: Affordable and user-friendly, great for beginners.
Method 3: Disconnect the Battery (Last Resort)
If you don’t have an OBD2 scanner and the drive cycle method didn’t work, you can try disconnecting the battery to reset the check engine light. This method forces the car’s computer to reset by cutting power, but it comes with risks.
How to Disconnect the Battery Safely
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 most Kia Souls, the battery is under the hood on the driver’s side.
Step 3: Disconnect the Negative Terminal
Use a wrench to loosen the nut on the negative (black) battery terminal. Carefully remove the cable and secure it away from the battery to prevent accidental contact.
Step 4: Wait 15–30 Minutes
This allows the car’s computer to fully discharge and reset. Some systems may require up to an hour.
Step 5: Reconnect the Battery
Reattach the negative cable and tighten the nut securely.
Step 6: Start the Car
Turn the ignition on and start the engine. The check engine light should be off—but only if the problem has been fixed.
Risks and Drawbacks
- Loss of radio presets: You may need to re-enter your favorite stations.
- Reset of adaptive transmission settings: The transmission may feel different until it relearns your driving habits.
- Loss of climate control settings: Some models reset seat heaters and AC preferences.
- Doesn’t fix the problem: If the issue persists, the light will return.
Because of these drawbacks, battery disconnect should only be used as a last resort.
Troubleshooting: What If the Light Keeps Coming Back?
If you’ve reset the check engine light on your Kia Soul but it keeps returning, there’s likely an unresolved issue. Here’s how to troubleshoot:
Recheck the Gas Cap
Even if you tightened it, the cap may be cracked or the seal worn. Replace it if necessary—most auto parts stores sell OEM-compatible caps for under $20.
Scan for New Codes
Use your OBD2 scanner to see if new or different codes appear. This can help pinpoint intermittent issues.
Inspect Wiring and Connectors
Loose, corroded, or damaged wiring to sensors can cause false readings. Check connections to the O2 sensor, MAF sensor, and ignition coils.
Check for Vacuum Leaks
A small leak in the intake manifold or vacuum hoses can trigger the light. Listen for hissing sounds or use a smoke machine for detection.
Monitor Fuel Trims
Advanced OBD2 scanners can show short-term and long-term fuel trims. High values may indicate a lean condition, often caused by a vacuum leak or faulty sensor.
Visit a Mechanic
If you’ve tried everything and the light persists, it’s time to see a professional. A certified Kia technician can perform a thorough inspection and may have access to manufacturer-specific diagnostic tools.
Preventing Future Check Engine Light Issues
The best way to avoid resetting the check engine light is to prevent it from coming on in the first place. Here are some proactive tips:
- Perform regular maintenance: Follow your Kia Soul’s scheduled service intervals for oil changes, spark plug replacements, and air filter changes.
- Use quality fuel: Top-tier gasoline with detergents can help keep sensors and injectors clean.
- Inspect the gas cap: Check it every time you refuel and replace it if it’s damaged.
- Address warning signs early: If you notice rough idling, poor fuel economy, or hesitation, get it checked before the light comes on.
- Keep the engine clean: Avoid oil leaks and excessive carbon buildup by using fuel additives occasionally.
Conclusion
Resetting the check engine light on your Kia Soul doesn’t have to be stressful or expensive. By understanding the cause, using the right tools, and following proven methods, you can clear the light safely and effectively. Whether you choose to drive through a complete drive cycle, use an OBD2 scanner, or—as a last resort—disconnect the battery, always make sure the underlying issue is resolved first.
Remember, the check engine light is there to protect your vehicle. Ignoring it can lead to costly repairs down the road. With the knowledge from this guide, you’re now equipped to handle the light with confidence and keep your Kia Soul running smoothly for years to come.