Reset Oil Service on Kia Ray with LAUNCH X431 – Step-by-Step Guide

Published: June 29, 2026

Quick Answer: Reset Oil Service on Kia Ray with LAUNCH X431

Connect your LAUNCH X431 to the Kia Ray's OBD-II port, turn the ignition ON (engine off), and open the Diagnostics app. Use Smart VIN to auto-detect your vehicle, then navigate to Service > Oil Reset. Tap “Perform” and wait for the confirmation message. Turn the ignition off for 30 seconds, then back on — the service light will be gone. The whole process takes under 2 minutes and works on gasoline and electric models.

Why Your Kia Ray Shows the Service Light

The Kia Ray is a compact city car (and electric version) sold primarily in Korea, built on the Hyundai i10 platform. It uses an Intelligent Service Reminder (ISR) system that tracks two things:

• Mileage-based intervals — typically every 10,000 km (about 6,000 miles)
• Time-based intervals — usually 12 months from the last reset

When either threshold is crossed, the ECU illuminates a “Service Required” or “Oil Service” warning on the dashboard. This isn't a mechanical fault — it's the car's way of saying “time for an oil change.” The LAUNCH X431 doesn't fix anything; it simply tells the ECU to erase the old service data and start counting from zero.

What happens if you ignore it? The warning stays on, and on some models the system may even limit certain functions or display persistent chimes. More importantly, skipping oil changes leads to engine wear. The reset is only legitimate after you've actually changed the oil and filter.

What You Need

Pro Tip: If you're using a used or borrowed LAUNCH X431, make sure the Kia software is up to date. An outdated module is the most common reason for reset failures.

Step-by-Step: Resetting the Oil Service Light

1. Connect the Scanner

Locate the OBD-II port under the dashboard, just below the steering wheel on the driver's side. Turn the ignition ON — press the start button twice without touching the brake (or turn the key to the "ON" position). Do not start the engine.

Plug the LAUNCH X431 diagnostic cable into the port. The scanner will boot up and establish communication via Bluetooth or USB cable. Wait for the home screen to load.

2. Auto-Detect the Vehicle (Smart VIN)

Open the Diagnostics app on the X431. Select Smart VIN or Auto Detect. The tool will read the vehicle's VIN and automatically pull up the correct year, model, and engine type.

• Why this matters: Manually selecting the wrong ECU protocol is a common mistake. For example, choosing "Hyundai i10" instead of "Kia Ray" can block the reset entirely.
• If Smart VIN fails (rare on LAUNCH units), manually select Kia > Ray > [year] > [engine] .

3. Navigate to Service Functions

Once inside the diagnostic menu, look for the Service tab at the top or side of the screen. Scroll until you find one of these options:

• Oil Reset
• Oil Service Due
• Service Light Reset

If you don't see any of those, check under Special Functions or Maintenance. On some software versions, the oil reset is nested inside a broader "Maintenance Reset" menu.

4. Execute the Reset

Tap the oil reset option. The LAUNCH X431 will display a short instruction screen — read it, then tap Reset or Perform. Do not touch the scanner or the vehicle's ignition for at least 10–15 seconds. The tool is communicating with the ECU and writing the new service interval data.

A message will appear: “The operation is successfully completed.” That's your confirmation.

5. Verify the Dashboard

Turn the ignition OFF and wait 30 seconds. This forces the ECU to exit diagnostic mode and store the new settings. Now turn the ignition ON again (engine still off) and look at the instrument cluster. The “Service Required” or “Oil Service” light should be gone. On most Kia Ray models, the remaining oil life will show 100%.

One more check: Start the engine. If the light remains off, you're done. If it comes back, move to the troubleshooting section below.

Troubleshooting: When the Reset Fails

Issue 1: Scanner Cannot Connect

Fix: Ensure the ignition is truly ON (not just ACC mode). On some Kia Ray models (especially 2012–2015), the ECU won't respond unless you cycle the key: ON → OFF → ON before plugging in the scanner. If that doesn't work, hard reset the X431 by unplugging it from the OBD port for 60 seconds, then reconnect.

Issue 2: "Function Not Supported" Error

Cause: Your LAUNCH X431 software is outdated or missing the Kia Ray package. The Ray shares its platform with the Hyundai i10, so if you only have “Hyundai” loaded without the Kia sub-module, the oil reset function may be locked.

Fix: Connect the X431 to Wi-Fi, go to Software Update, and download the latest Kia/Hyundai software. Updates are free during the license period (usually 1–2 years from purchase).

Issue 3: Light Comes Back After Driving

This is the most frustrating scenario. Here are the two most likely causes:

• Cause 1 – Manual reset conflict: If you (or a previous owner) tried the manual dash button reset method and it partially worked, the ECU may have two conflicting service counters. Use the LAUNCH X431 to perform a “Remaining Oil Life Reset” — not just a dashboard light kill. This fully initializes the ISR system.
• Cause 2 – Incomplete initialization: Navigate to Special Functions > Oil Service > Initialize. The scanner will ask you to enter a new distance interval (e.g., 10,000 km). Confirm, and the ECU will start counting from that value.

Issue 4: Language or Protocol Mismatch

Some imported Kia Rays (gray-market units) use ECUs with Korean-language tables. If you see garbled text or the reset function is grayed out, go to Toolbox > Settings > Language on the LAUNCH X431 and switch to English or 한국어 (Korean). The scanner will reboot and re-negotiate the protocol.

Issue 5: Electric Vehicle (EV) Model Considerations

The Kia Ray EV does not have engine oil, but it has reduction gear oil that requires periodic service (usually every 40,000 km). The service light on EV models is time-based (12 months) and triggers an “inspection” reminder. Use the same steps above — the LAUNCH X431 will reset the maintenance counter without affecting any EV-specific systems.

Frequently Asked Questions

Can I reset the oil service on a Kia Ray without a scanner?

Yes, on some trims you can do a manual reset: turn ignition ON, press and hold the Trip Reset button until the service light blinks, then turn the ignition OFF. However, this method doesn't work on all models (especially EVs) and often fails to fully clear the ECU counter. The LAUNCH X431 is the only reliable way across all Ray variants.

Will resetting the oil service light affect my odometer or mileage?

No. The LAUNCH X431 only resets the service interval reminder. It cannot alter the vehicle's actual odometer reading. Any tool that claims to change mileage is illegal and should not be trusted.

How often should I reset the oil service?

Only after you have actually changed the engine oil and filter (or reduction gear oil for EVs). Resetting without performing the service will cause the system to give false reminders, potentially leading to engine or gear damage if you forget the real service date.

What does "Service Required" mean on my Kia Ray EV?

On the Kia Ray EV, the message triggers based on elapsed time (usually 12 months), not mileage. It indicates that a routine inspection is due — this includes checking the reduction gear oil, brake fluid, and high-voltage components. The LAUNCH X431 reset will clear the reminder after the inspection is done.

Is the LAUNCH X431 difficult to use for a beginner?

Not at all. The X431 has a full-color touchscreen with guided menus. If you can connect to Wi-Fi and follow on-screen prompts, you can perform this reset in under three minutes. It's designed for both professional shops and DIY home mechanics.

What if my scanner says "Oil Reset" but the light stays on after the procedure?

Try a hard reset of the vehicle's ECU: disconnect the battery's negative terminal for 5 minutes, reconnect it, and repeat the LAUNCH X431 reset from step 4. This clears any residual voltage that might be holding the old data.

Conclusion

The LAUNCH X431 is the most efficient and reliable tool for resetting the oil service light on a Kia Ray. Whether you drive a gasoline model or the electric version, the process takes less than two minutes when you follow the Smart VIN auto-detect and Service menu path. Keep your X431 software updated, always verify the dashboard after resetting, and never skip the actual oil change.

Call to Action: Have a different issue with your Kia Ray or LAUNCH X431? Leave a comment below! We update this guide monthly based on reader feedback.

For more information on LAUNCH diagnostic tools and to purchase the right model for your needs, check out our [guide to choosing an OBD scanner for Korean vehicles]. If you own a Hyundai i10 (the Ray's platform mate), the same reset procedure applies — see our [step-by-step for Hyundai oil reset].

About the Author: Erwin Salarda is an Automotive Service Equipment Technician based in the Philippines, specializing in computerized automotive diagnostic equipment such as OBD scanners and wheel alignment systems. Since 2012, he has been actively providing technical support, equipment installation, troubleshooting, after-sales service, and hands-on training for automotive service equipment used by workshops and automotive professionals.

He has received specialized training from international suppliers and manufacturers, including Launch X431 in Shenzhen, China, Lawrence Engineering Company in Guangzhou, China, and 3Excel Wheel Alignment Company in Shenzhen, China. Through these trainings, he developed advanced expertise in automotive diagnostics, calibration, wheel alignment systems, and computerized automotive service technologies.

Erwin Salarda provides professional after-sales support and technical training for automotive diagnostic and wheel alignment equipment, helping clients maximize the performance and proper use of their tools and systems. His experience covers equipment setup, software updates, calibration procedures, troubleshooting, and operational guidance for automotive workshops and service centers.

With more than a decade of experience in the automotive equipment industry, Erwin Salarda continues to support automotive businesses by delivering reliable technical expertise and practical training solutions.

For inquiries and equipment purchases, please visit https://carlifterph.com/

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