Polaris Sportsman 570 Fault Codes - Decode & Fix Common Issues

You’re carving up your favorite trail, the engine is humming, and then it happens. That little amber check engine light blinks to life on your Polaris Sportsman 570’s dashboard. Your heart sinks a little. Is it serious? Is your weekend over? Is this going to be an expensive trip to the dealer?

We’ve all been there. A mysterious warning light can instantly turn a great ride into a stressful guessing game. But what if you could take the mystery out of it?

We promise this guide will empower you to become your own first line of defense. You’ll learn how to pull the diagnostic codes right from your machine—no fancy scanner needed—and understand what they actually mean.

In this comprehensive guide, we’ll break down how to access the polaris sportsman 570 fault codes, decode the most common ones, and walk you through practical troubleshooting steps to get you back on the trail with confidence. Let’s get that wrench turning.

What Are Polaris Sportsman 570 Fault Codes and Why Do They Matter?

Think of fault codes, also known as Diagnostic Trouble Codes (DTCs), as a secret language your ATV uses to tell you what’s wrong. When a sensor on your engine, transmission, or power steering system detects a problem, it sends a signal to the machine’s brain—the Electronic Control Unit (ECU).

The ECU then logs a specific code and triggers the check engine light (CEL) to get your attention. Understanding these codes is the first and most critical step in any modern vehicle diagnosis.

Your ATV’s On-Board Diagnostic System Explained

Your Sportsman 570 is smarter than you might think. Its on-board diagnostic system constantly monitors dozens of parameters, from engine temperature to the angle of your throttle. This system is designed to keep your machine running efficiently and safely.

When a parameter goes outside its normal range, a code is stored. This system doesn’t just tell you something is broken; it often points you directly to the affected circuit or component, saving you hours of guesswork.

The Real Benefits of Understanding Polaris Sportsman 570 Fault Codes

Learning how to read these codes is a game-changer. Here are the main benefits of polaris sportsman 570 fault codes knowledge:

Save Money: You can diagnose many issues yourself, avoiding costly diagnostic fees at a shop. You’ll buy the right part the first time instead of just throwing parts at a problem.
Save Time: Knowing the code helps you pinpoint the issue quickly, drastically reducing your downtime and getting you back to riding sooner.
Prevent Major Damage: A minor code, like a faulty sensor, can sometimes lead to a major engine failure if ignored. Addressing codes early is a form of preventative maintenance.
Become a Smarter Owner: Even if you don’t do the repair yourself, you can walk into the shop with knowledge, preventing you from being taken advantage of.

How to Access Your Polaris Sportsman 570 Fault Codes (No Special Tools Needed!)

One of the best features of the Sportsman 570 is its built-in diagnostic mode. You don’t need an expensive OBD-II scanner like you would for a car. This is a crucial how to polaris sportsman 570 fault codes skill every owner should have.

Just follow these simple steps. Be patient and perform them exactly as described.

Step-by-Step: The Key-On, Key-Off Method

Sit on the ATV: Make sure the machine is in Park (P) and on a level surface.
Key Off: Ensure the ignition key is in the OFF position.
Press and Hold the Mode/Override Button: Locate the yellow mode/override button on the left-hand control pod. Press it and hold it down.
Turn the Key On: While still holding the button, turn the ignition key to the ON position. Do not start the engine.
Wait for “DIAG”: Continue holding the button. The digital display will cycle through its normal startup, and then you should see the word “DIAG” (Diagnostic Mode) appear. You can now release the button.
Cycle Through Menus: Use the mode button to cycle through the available diagnostic menus. You are looking for the “Check Engine” or “DTC” menu.
View the Codes: Once on the correct screen, the active fault codes will be displayed. If there are multiple codes, you can cycle through them using the mode button.

Understanding the Display: SPN and FMI Numbers

When a code appears, it won’t be a simple message like “Bad Spark Plug.” It will be a set of numbers, typically an SPN (Suspect Parameter Number) and an FMI (Failure Mode Identifier).

The SPN tells you which system or component is having a problem (e.g., Throttle Position Sensor).
The FMI tells you what kind of problem it is (e.g., Voltage Too High, Data Erratic).

Write these numbers down exactly as they appear. They are your key to solving the puzzle.

The Ultimate Polaris Sportsman 570 Fault Codes Guide: Common Codes & What They Mean

Now that you have your codes, it’s time to translate them. Below is a list of some of the most common problems with polaris sportsman 570 fault codes. This is not an exhaustive list, but it covers the issues we see most often here at FatBoysOffroad.

Engine & Fuel System Codes

These codes relate to how your engine runs, breathes, and gets fuel. They are often the most critical to address quickly.

SPN 520207, FMI 7 (Misfire Detected): This is the big one. It means the ECU has detected that one cylinder isn’t firing correctly.
- Common Causes: Fouled or bad spark plug, loose spark plug wire, bad ignition coil, clogged fuel injector, low fuel pressure.
- First Steps: Start with the easiest fix. Inspect and replace the spark plug. Check that the plug wire is securely snapped onto the plug and the coil.
SPN 651 / 656, FMI 3 or 4 (Engine Throttle Position Sensor – Voltage High/Low): Your ECU doesn’t know how much you’re pressing the gas. This can cause poor idling, stalling, and a lack of power.
- Common Causes: A bad Throttle Position Sensor (TPS), damaged wiring to the sensor, or a throttle body issue.
- First Steps: Inspect the wiring harness near the throttle body for any visible damage or corrosion. Sometimes, simply unplugging, cleaning the connector with electrical contact cleaner, and adding dielectric grease can fix it.

Electronic Power Steering (EPS) Codes

If your Sportsman has power steering, a fault here will usually result in the steering becoming very heavy and difficult to turn.

SPN 520230, FMI 31 (Power Steering Fault): This is a general EPS fault code.
- Common Causes: Low battery voltage is a huge culprit! The EPS motor draws a lot of power. It can also be a bad connection at the EPS unit or a failing EPS motor itself.
- First Steps: Before you do anything else, fully charge and test your battery. A weak battery is the number one cause of random EPS faults. Check all battery connections for tightness and corrosion.

Electrical & Drivetrain Codes

These codes cover a wide range of issues, from communication errors to sensor failures.

SPN 636, FMI 2, 8 (Crank Position Sensor): The ECU has lost the signal from the crank position sensor, which tells it the engine’s speed and position. The engine will not run without this signal.
- Common Causes: Bad sensor, damaged wiring, or excessive metallic debris on the sensor’s magnetic tip.
- First Steps: Locate the sensor on the engine case. Inspect the wiring. Sometimes, removing the sensor and cleaning its tip is all that’s needed.
SPN 746, FMI 31 (CAN Bus Communication Error): The different computers on your machine (like the ECU and the gauge cluster) aren’t talking to each other properly.
- Common Causes: This is often due to a poor connection, a damaged wire in the main harness, or a failing component flooding the network with bad data. Water intrusion in connectors is a common cause after a deep water crossing.
- First Steps: This is a tough one for a DIYer. Start by checking all major electrical connectors. Disconnect them, look for green corrosion or bent pins, clean them, and add dielectric grease before reconnecting.

Troubleshooting Based on Your Fault Codes: Best Practices

Finding the code is only half the battle. Now you need a smart approach to fixing the issue. Following these polaris sportsman 570 fault codes best practices will save you headaches.

Always Check the Simple Stuff First

Before you order a $200 sensor, always check the basics. A huge percentage of electrical fault codes are caused by simple, overlooked issues.

Battery & Connections: Is your battery fully charged (12.6V or higher)? Are the terminals clean and tight? A weak battery can cause a cascade of confusing fault codes.
Fuses: Pull and inspect the relevant fuses. A visual check isn’t enough; use a multimeter to test for continuity.
Wiring & Connectors: Look for chaffed wires, melted plastic, or loose connectors, especially around hot or moving parts. A mouse nest can wreak havoc on a wiring harness.

When to Clear the Code and When to Call a Pro

After you perform a repair (like changing a spark plug for a misfire code), you should clear the code. This is usually done by disconnecting the battery for about 15 minutes. Ride the machine and see if the code returns. If it does, your fix didn’t work, and you need to dig deeper.

Know your limits. If you’re dealing with complex communication codes (like CAN bus errors) or if you’ve tried the basics and are still stumped, it might be time to take it to a trusted, qualified technician. There’s no shame in asking for help.

A Care Guide for Preventing Future Fault Codes

The best way to deal with fault codes is to prevent them from happening in the first place. This is where a good maintenance routine and some sustainable polaris sportsman 570 fault codes prevention habits come in.

A well-maintained machine runs more efficiently, uses less fuel, and produces fewer emissions, making it a more eco-friendly polaris sportsman 570 fault codes solution in the long run.

Keep it Clean: Mud and water are enemies of electrical systems. After a muddy or wet ride, wash your ATV thoroughly. Pay special attention to cleaning around connectors and sensors.
Dielectric Grease is Your Friend: Periodically disconnect major electrical connectors, inspect them for corrosion, and apply a small amount of dielectric grease. This waterproofs the connection and prevents future issues.
Regular Fluid Changes: Follow the maintenance schedule in your owner’s manual for oil, transmission fluid, and coolant. Healthy fluids keep mechanical parts happy, which prevents them from triggering sensor faults.
Battery Tender: If you don’t ride often, keep your ATV on a battery tender. This preserves battery life and prevents the voltage-related gremlins we discussed earlier.

Frequently Asked Questions About Polaris Sportsman 570 Fault Codes

Can I damage my ATV by riding with the check engine light on?

It depends on the code. For a minor sensor issue, you can likely ride it home carefully. However, if the light is flashing or the machine is running very poorly (misfiring, overheating), you should stop immediately to prevent catastrophic engine damage.

How do I clear the fault codes on my Sportsman 570?

The most common method is to disconnect the negative battery terminal for 15-20 minutes. This will reset the ECU and clear any stored codes. Note that if the underlying problem hasn’t been fixed, the code will likely reappear after you start and ride the machine.

What if I look up my code and can’t find it on any list?

Polaris occasionally uses specific codes that aren’t widely published. In this case, your best resources are dedicated forums like PolarisRiders.com or, ultimately, the dealer’s service department. When posting on a forum, be sure to provide the full SPN and FMI numbers, plus the year of your machine.

Understanding the language of your Sportsman 570 is a powerful skill. It transforms you from a passive owner into a confident, hands-on enthusiast who can tackle problems head-on. By following this guide, you’ve taken the first step toward saving money, reducing downtime, and getting more enjoyment out of every ride.

Now grab your tools, check those codes, and get back on the trail. Ride safe out there!

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Thomas Corle

Founder & Automobile expert at FatBoysOffroad

Automobile expert and off-road enthusiast, sharing in-depth knowledge of vehicles, gear, and adventures. Helping readers make smart decisions and enjoy the thrill of off-roading safely and confidently.