This guide walks you through how to reset the check engine light on a Polaris Ranger 570 using simple methods and professional tools. Whether you’ve fixed the issue or just want to clear the warning, we’ll help you get your UTV back to peak performance.
Key Takeaways
- Understand the cause first: Always diagnose the underlying issue before resetting the light to avoid recurring problems.
- Use a diagnostic scan tool: The most reliable way to reset the check engine light is with an OBD2 scanner compatible with Polaris vehicles.
- Try the key cycle method: Turning the key on and off multiple times can sometimes reset the light on older Ranger 570 models.
- Check battery and connections: A weak battery or loose connections can trigger false engine codes.
- Reset after repairs: Always clear the code after fixing the problem to confirm the repair was successful.
- Monitor for recurring lights: If the light returns, it may indicate a persistent mechanical or electrical issue.
- Consult a technician if unsure: When in doubt, seek professional help to avoid damaging your UTV’s engine or ECU.
How to Reset Check Engine Light on Polaris Ranger 570
If you own a Polaris Ranger 570, you know how reliable and powerful this utility task vehicle (UTV) can be. Whether you’re hauling gear across a farm, navigating rough trails, or working on a construction site, the Ranger 570 is built for durability and performance. But like any machine, it can run into issues—and one of the most common warnings you might see is the dreaded check engine light.
That little amber or red light on your dashboard can be alarming, especially if you’re not sure what’s causing it. But don’t panic. In many cases, the check engine light on your Polaris Ranger 570 can be reset safely and easily—once you understand what triggered it in the first place.
In this comprehensive guide, we’ll walk you through everything you need to know about how to reset the check engine light on your Polaris Ranger 570. You’ll learn what the light means, how to diagnose the problem, and the best methods to clear it—whether you’re using a professional scan tool or a simple key cycle trick. We’ll also cover troubleshooting tips, common causes, and when it’s time to call in a professional.
By the end of this guide, you’ll have the confidence and knowledge to handle check engine light issues like a pro—keeping your Ranger 570 running smoothly and safely.
What Does the Check Engine Light Mean on a Polaris Ranger 570?
Visual guide about How to Reset Check Engine Light on Polaris Ranger 570
Image source: techcult.com
Before you reset the check engine light, it’s important to understand what it’s trying to tell you. The check engine light—also known as the malfunction indicator lamp (MIL)—is part of your Ranger 570’s onboard diagnostics system (OBD2). When the engine control unit (ECU) detects a problem with the engine, emissions system, or other critical components, it triggers the light to alert you.
The light can come on for a wide range of reasons, from minor issues like a loose gas cap to more serious problems like a faulty oxygen sensor or ignition coil. In some cases, the light may flash, which indicates a severe misfire that could damage the catalytic converter if not addressed immediately.
Common causes of the check engine light on a Polaris Ranger 570 include:
– Loose or damaged gas cap
– Faulty oxygen (O2) sensor
– Dirty or failing mass airflow (MAF) sensor
– Weak battery or charging system issues
– Clogged air filter
– Spark plug or ignition coil problems
– Exhaust system leaks
– Engine overheating
Because the light can signal anything from a simple fix to a major repair, it’s crucial not to ignore it. Resetting the light without addressing the root cause could lead to further damage or unsafe operating conditions.
When Should You Reset the Check Engine Light?
You should only reset the check engine light after you’ve identified and fixed the underlying problem. Resetting the light prematurely—without diagnosing the issue—can be dangerous and may void your warranty if a serious problem goes unnoticed.
Here are a few scenarios when it’s appropriate to reset the light:
– You’ve tightened or replaced a loose gas cap.
– You’ve replaced a faulty sensor (like the O2 or MAF sensor).
– You’ve cleaned or replaced a dirty air filter.
– A mechanic has repaired the issue and confirmed it’s resolved.
– The light came on due to a temporary glitch (e.g., low battery voltage after a long storage period).
If the light comes back on after resetting, it means the problem hasn’t been fully resolved. In that case, further diagnosis is needed.
Tools You’ll Need to Reset the Check Engine Light
Depending on the method you choose, you may need one or more of the following tools:
- OBD2 Scan Tool: This is the most reliable and recommended method. Look for a scanner that’s compatible with Polaris vehicles. Popular options include the Foxwell NT510, Autel MaxiCOM, or the Polaris-specific TechEdge diagnostic tool.
- Smartphone with Bluetooth OBD2 Adapter: Devices like the BlueDriver or OBDLink MX+ connect to your phone and allow you to read and clear codes using a mobile app.
- Basic Hand Tools: Screwdrivers, wrenches, or pliers may be needed to access the battery or gas cap.
- Multimeter: Useful for checking battery voltage and electrical connections.
- Clean Cloth or Compressed Air: For cleaning sensors or connections.
Having the right tools on hand will make the process faster and more effective.
Method 1: Using an OBD2 Scan Tool (Recommended)
The most accurate and professional way to reset the check engine light on your Polaris Ranger 570 is by using an OBD2 scan tool. This method allows you to read the diagnostic trouble codes (DTCs), understand what’s wrong, and clear the codes after repairs.
Step 1: Locate the OBD2 Port
The OBD2 port on the Polaris Ranger 570 is typically located under the dashboard on the driver’s side. You may need to crouch down or use a flashlight to find it. It’s a 16-pin connector that looks similar to a trapezoid-shaped plug.
Step 2: Turn the Ignition to the “On” Position
Insert the key and turn it to the “ON” position, but do not start the engine. This powers up the ECU and allows the scan tool to communicate with the vehicle’s computer.
Step 3: Connect the Scan Tool
Plug the OBD2 scanner into the port. Make sure it’s securely connected. Most scanners will power on automatically when plugged in.
Step 4: Read the Diagnostic Trouble Codes (DTCs)
Follow the scanner’s instructions to read the codes. The tool will display one or more codes, such as P0171 (system too lean) or P0300 (random misfire). Write down these codes—they’ll help you understand what needs to be fixed.
Step 5: Diagnose and Repair the Issue
Use the codes to identify the problem. For example:
– P0455: Large EVAP leak—check the gas cap.
– P0135: O2 sensor heater circuit malfunction—inspect the sensor wiring.
– P0101: MAF sensor performance—clean or replace the sensor.
Once you’ve made the necessary repairs, proceed to the next step.
Step 6: Clear the Codes
On most scan tools, there’s a “Clear Codes” or “Erase DTCs” option. Select it to reset the check engine light. The scanner will confirm that the codes have been cleared.
Step 7: Turn Off the Ignition and Disconnect the Tool
Turn the key back to the “OFF” position and unplug the scan tool. Start the engine to verify that the check engine light is off.
Step 8: Test Drive the Vehicle
Take your Ranger 570 for a short drive to ensure it’s running smoothly. If the light stays off, the problem has been resolved. If it returns, further diagnosis is needed.
Method 2: Using the Key Cycle Method (Alternative)
If you don’t have access to a scan tool, you can try the key cycle method. This technique works by resetting the ECU’s memory through a series of ignition cycles. While it’s not as reliable as using a scanner, it can work on some Polaris Ranger 570 models—especially older ones.
Step 1: Turn the Ignition On and Off
Insert the key and turn it to the “ON” position (do not start the engine). Wait about 5 seconds, then turn it back to “OFF.” Repeat this cycle three times.
Step 2: Start the Engine
After the third cycle, start the engine and let it idle for about 10–15 minutes. This allows the ECU to recalibrate and may clear minor fault codes.
Step 3: Turn Off and Wait
Turn off the engine and wait at least 30 minutes. This gives the system time to reset.
Step 4: Restart and Check
Start the engine again. If the check engine light is off, the reset was successful. If it remains on, the issue may be more serious and requires a scan tool.
Note: This method doesn’t work for all codes and may not clear persistent or severe faults. It’s best used as a temporary solution or for minor glitches.
Method 3: Disconnecting the Battery (Last Resort)
Disconnecting the battery can reset the ECU and clear the check engine light, but it’s not recommended as a first option. This method can also reset other systems, such as radio presets, clock settings, and adaptive transmission learning.
Step 1: Turn Off the Engine and Remove the Key
Make sure the vehicle is completely off and the key is removed.
Step 2: Locate the Battery
The battery on the Polaris Ranger 570 is usually located under the seat or in the rear cargo area. Lift the seat or remove the panel to access it.
Step 3: Disconnect the Negative Terminal
Use a wrench to loosen the nut on the negative (black) battery terminal. Remove the cable and isolate it so it doesn’t touch the battery post.
Step 4: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes. This allows the ECU to fully discharge and reset.
Step 5: Reconnect the Battery
Reattach the negative terminal and tighten it securely. Replace the seat or panel.
Step 6: Start the Engine
Turn the key to “ON” and then start the engine. Check if the check engine light is off.
Warning: This method may not clear all codes, and some systems may need to be recalibrated. It’s best used only if other methods fail.
Troubleshooting Common Issues
Even after resetting the light, you may run into problems. Here’s how to troubleshoot common issues:
The Light Comes Back On Immediately
If the check engine light returns right after resetting, the underlying problem hasn’t been fixed. Use a scan tool to read the new codes and address the root cause.
Scan Tool Won’t Connect
Make sure the ignition is on, the OBD2 port is clean, and the scanner is compatible with Polaris vehicles. Try a different scanner or check for blown fuses.
Battery Voltage Is Low
A weak battery can cause false codes. Use a multimeter to check voltage—it should be around 12.6 volts when off and 13.5–14.5 volts when running. Charge or replace the battery if needed.
Gas Cap Is Loose or Damaged
A loose or cracked gas cap is one of the most common causes of the check engine light. Tighten it or replace it with an OEM cap.
Sensor Connections Are Dirty or Corroded
Clean electrical connectors with electrical contact cleaner and a small brush. Ensure all connections are tight.
Preventing Future Check Engine Light Issues
The best way to avoid check engine light problems is through regular maintenance. Here are some tips to keep your Polaris Ranger 570 in top condition:
- Change the oil and filter regularly: Follow the manufacturer’s recommended schedule (usually every 50–100 hours or annually).
- Replace the air filter: A dirty air filter can cause lean fuel conditions and trigger codes.
- Inspect spark plugs: Replace them every 100–200 hours or as recommended.
- Check the fuel system: Use clean, fresh fuel and inspect for leaks.
- Keep the battery charged: Use a trickle charger during long storage periods.
- Tighten the gas cap: Always make sure it’s secure after refueling.
- Perform visual inspections: Look for loose wires, leaks, or damaged components.
Regular maintenance not only prevents check engine light issues but also extends the life of your UTV.
When to See a Professional
While many check engine light issues can be resolved at home, some problems require professional attention. Seek help from a certified Polaris technician if:
– The light is flashing (indicating a severe misfire).
– You’re unable to read or clear codes with a scan tool.
– The vehicle is running rough, overheating, or losing power.
– You suspect electrical or fuel system problems.
– The issue persists after repairs.
A professional mechanic has access to advanced diagnostic tools and can perform in-depth testing to pinpoint complex issues.
Conclusion
Resetting the check engine light on your Polaris Ranger 570 doesn’t have to be stressful. With the right tools and knowledge, you can safely clear the warning and get back to work or play. Remember, the key is to always diagnose the problem first—don’t just reset the light and hope it goes away.
Using an OBD2 scan tool is the most reliable method, but the key cycle or battery disconnect methods can work in a pinch. Regular maintenance and prompt repairs will help prevent future issues and keep your Ranger 570 running at its best.
By following this guide, you’ll not only learn how to reset the check engine light but also gain a better understanding of your UTV’s health. Stay proactive, stay safe, and enjoy every ride.